Dietary manipulation is a key approach to reduce methane emissions from ruminant livestock, but its application in grazing systems is poised with challenges. We reviewed findings from research in New Zealand aimed at characterising ‘low methane’ feeds for grazing ruminants. Although some progress is evidenced from animal experiments, on-farm productivity and profitability are yet to be integrated in the meaningful evaluation of mitigation approaches.

Rearing lambs without their mothers during pre-weaning is not a common practice in Pakistan. Kajli sheep were reared with or without their mothers for evaluating their growth performance and cost comparisons. In the absence of ewe’s milk, Kajli lambs performed better on buffalo-milk than on cow-milk or milk replacer during pre-weaning period.

It is important to know if there is any relationship between productions of methane and urinary nitrogen in ruminants. A statistical work was performed on a database to elucidate this issue. For diets including only forages, dietary factors such as dry matter intake level and the organic matter digestibility induce a positive relationship between the productions of these two potential pollutants.

Various evidence show hat conditions during prenatal development affect the metabolic health of individuals once adults. Data in humans, non-ruminant and ruminant species indicate clearly that reproductive function is also affected by pre-natal developmental conditions, although direct effects on fertility are yet relatively scarce. This is an important parameter to take into consideration in establishing nutritional planes in breeding animals.

We tested the whether duration of low plane of nutrition would affect the composition of milk protein and casein, and whether any effects would persist after re-feeding. A 9 week period of reduced plane of nutrition caused greater changes in protein composition than a 3 week duration. These effects did not persist after re-feeding.

Ultrasonography can be used as a non-invasive tool to estimate body composition during pregnancy. We estimated the body composition and fat depots of pregnant goats by indirect measurements and observed positive correlation with these measurements and fat depots and body fat and energy contents. These results allowed us to develop models that will aid in the monitoring of the nutritional status of pregnant goats.

Temperate dairy systems in southern Australia and New Zealand are underpinned by the efficient use of the home-grown feed-base and purchased supplements. While established principles exist to nutritionally balance such rations, the variable supply of nutrients under grazing often results in suboptimal performance. This review discusses the key factors that affect responses to supplementation in grazing systems, and considers where future research may be directed to improve animal performance from pasture-based systems.

Increasing interest in dairy goat and milk has fuelled by their contribution to nutrition, food security and improved livelihood of resource-poor small farmers. The opportunities for farmers to scale up, expand and commercialise production is enormous. The establishment of the Asian-Australasian Dairy Goat Network provides stands ready to join member countries to develop strategies for sustainable dairy goat production.

Events occurring in the early life of an animal have potential implications later in life. This work aimed at describing the temporal sequence of microbial colonisation during the first month of life in goat kids reared in two different feeding systems (natural with the dam and artificial with milk replacer). The results confirmed substantial microbial colonisation from first day of life in the undeveloped rumen and identified the first 14 days as the most sensitive window of time for potential manipulations.

Roughage intake within 3 h of wheaten straw and barley grain being offered was greater when sheep were offered finely chaffed (6 mm) than either coarsely chaffed (15–25 mm) or unprocessed straw. Rumen pH and total volatile fatty acid concentrations 3 h post-feeding did not differ between roughage types. Over 10 days of grain feeding, daily roughage intake was greater in sheep offered fine than coarse chaff, while sheep offered unprocessed roughage had an intermediate intake. Shorter particle lengths for roughage may play a role during grain introduction.

The ability of a newborn lamb to maintain core body temperature is a key determinant of survival. This study demonstrated that thermo-imaging technology can be used to measure radiated heat loss in newborn lambs, providing a non-invasive tool for intensive animal measurement in confinement, and potentially under farming conditions. Such approaches are required to evaluate the success of strategies (e.g. feeding and/or management) that aim to improve the survival of lambs in the field.

The effect of leucaena, Enterolobium cyclocarpum, fruits and a mixture of both feeds on in vitro gas production and in vivo sheep productive performance was evaluated. Higher intake, digestibility and sheep performance were observed with diets containing grass + leucaena + E. cyclocarpum mixture. The results can be explained by their higher protein, lower cell walls and higher DM digestibility.

It is important for dairy farmers to optimise milk production per kg of feed consumed due to the high cost of feed. We compared the whole-tract digestibility of DM and N in Holstein-Friesian dairy cows selected for divergent RFI and it was identified that digestibility of DM and N did not differ among RFI treatment groups. Therefore, emphasis on selection for phenotypic divergence in RFI may not contribute to improved utilisation of consumed nutrients in Australian Holstein-Friesian dairy cows.

The aim of this study was to examine the changes in some plasma oxidative stress biomarkers in cows with ovulatory and an-ovulatory response in synchronized oestrus. A significant decrease in BAP and GSH were observed in ovulated cows which might be the consequence of OS caused by the luteolytic action of PGF_2α and the subsequent ovulatory event. This type of study will provide an understanding of the physiological role of OS biomarkers on the ovulatory process.

Maximising efficiency and meeting carcass market specifications are important goals for today’s beef producers. Selection for increased whole body muscling within a British-bred herd resulted in improved feed efficiency, adequate fatness and higher retail meat yield in steer progeny. Increasing the levels of whole body muscling in poorly muscled herds could help producers achieve improved efficiency and superior carcasses.

The paper deals with the reduction in voluntary food intake (anorexia) that accompanies infection with pathogens. Its thesis is that the phenomenon would become more predictable if a causal and a functional approach to anorexia are combined. This is tested in the development of a simulation model that predicts the consequences of a gastrointestinal parasite in grazing sheep.

Muscle score (MS) is highly heritable (56–63%), with an estimated genetic correlation of 99% between weaning and yearling MS. Estimated genetic correlations with eye muscle area are moderate (55%). Estimated breeding values for MS could help make beef production more efficient and profitable, given its favourable relationships with meat yield and feed efficiency without detrimental effects on meat quality or maternal productivity.

Dairy farmers should be more aware of the benefits arising from an improved business approach to their dairy enterprise. Data collected from 30 farms in Peninsular Malaysia highlight the economic benefits from a series of improved on-farm management practices. The ‘bottom line’ is that better feeding and herd management is very profitable.

This paper reviews influences including nutrition during pregnancy and/or lactation within pasture-based systems on postnatal productivity of beef cattle, within the economic context of maternal productivity and efficiency. Applications of wireless sensor networks including measurement of pasture intake, the input trait that underpins livestock production efficiency, are also discussed.

Knowledge on nutrient passage through the digestive tract of ruminants is important to predict nutrient supply to the animal. We quantified rumen passage rates of carbon stable isotope (¹³C)-labelled concentrate dry matter and fibre fractions in beef heifers fed a high-concentrate diet. Our results suggest rumen passage kinetics for these two fractions were similar in beef heifers receiving a high-concentrate diet, and were comparable to those based on the more commonly used external marker chromium-mordanted fibre.

Residual feed intake (RFI) is a measure of animal-level feed efficiency. The objective was to measure growth, feed intake and maternal performance of Angus heifers sired by bulls selected for low or high estimated breeding values for RFI. This experiment shows that beef cattle selected for low RFI have higher growth rates and heavier live weights than cattle selected for high RFI but similar calf production at first breeding.

Effects of dietary protein restriction during the peri-conception period and first trimester in yearling heifers on conceptus growth and development were evaluated. Early conceptus development was altered by dietary treatment in a gender-dependant manner. Altered fetal growth could have long-term implications for offspring metabolism and development and warrants further investigation.

Vitamin D metabolites are important regulators of Ca and P homeostasis. The study aimed at characterising the potential role of 25-OHD₃ on gastrointestinal Ca and P absorption and it could be demonstrated that the intestinal absorption of both minerals was stimulated by 25-OHD₃. These results provide evidence for new concepts on the biological activity of 25-OHD₃.

There is an ongoing quest for identifying a feeding strategy that persistently can reduce enteric methane (CH₄) production from ruminants without compromising production. The aim of the present study was to determine the acute effect of feeding nitrate to dairy cows on enteric CH₄ production. Enteric CH₄ production decreased with 31% as a result of feeding nitrate and subsequently increased with 34% when nitrate was stopped, and it is concluded that nitrate addition is a potent mitigation strategy.

The reproductive performance of cows can be improved through better nutrition. We evaluated the potential of village-based diets to increase the weight and condition of cows in a short period of time, but none of the diets contained enough metabolisable energy or protein for high liveweight gains. Increasing condition of cows quickly is difficult within village-based systems and a more efficient strategy would be to maintain condition of cows during pregnancy and lactation.

Body surface temperature (BST) of cattle using infrared thermography (IRT) well reflects the thermal circumstance surrounding animal. The present study aimed to find out whether BST measurement is a useful method to detect thermal balance of livestock and eye BST was the least variable of all BST measured. The results indicated that BST may be used as an effective tool for precision cattle farming.

Increased incidence and severity of disease during the transition period decreases the production efficiency of dairy cattle. A major underlying factor responsible for the development of transition cow disorders is metabolic stress, which occurs when cows fail to adapt physiologically to an increase in nutrient requirements needed for parturition and the onset of copious milk synthesis and secretion. The ability to detect signs of metabolic stress early enough in the dry period to implement needed management adjustments prior to calving will be the key to successful monitoring and intervention programs.

As small ruminants are often used in basic research as models for the dairy cow, it is the aim of the present paper to give a summary of the similarities and differences between sheep and goats found in recent studies focusing on calcium homeostasis. Our results demonstrate that mineral homeostasis in herbivores is far too complex to be divided simply into ‘hindgut fermenter’ and ‘forestomach’ types.

The medical profession recommends consumers source meat with low levels of saturated fats and lean lamb, trimmed of all salvage fat, can provide this. This is generally applicable to lamb produced across a range of environments despite variation due to diet (grain based diets higher) and breed types. The results show that if consumers eat lean lamb and remove salvage fat, which is now common practice, the meat will have acceptable levels of saturated fat.

Beef production based on tropical pastures is influenced by the rate of digestion of material in the rumen. The effect of the form and amount of novel nitrogen supplements on the rate of digestion of tropical forages in the rumen was evaluated. The amount but not the form of supplement increased rate of digestion in the rumen which is important when considering supplementation strategies for tropical beef production systems.

Intramuscular fat in beef is an important factor in its flavour and texture, and hence price. We have used the analysis of the expression of genes in muscle to identify the source of the fat; either synthesised in the muscle fat cells, or taken up from circulation. We have shown that age, diet and breed affect the amount and source of the fat and predict consequential impacts on fat composition.

The present study examined the effects of concentrate level and protein supplementation on performance of crossbred bulls fed a whole-crop barley silage-based diet. The effects of increasing concentrate level on production responses were similar as reported with grass silage-based diets. Protein supplementation had no effects on growth and did not improve carcass traits. Therefore, there is no reason to use protein supplementation for growing/finishing bulls at more than 300-kg liveweight when they are fed with good quality whole-crop barley silage and barley-based concentrate.

Understanding how a grazing cows rumen deals with legume pastures is important if we are to better predict intake and digestive processes of these cows. This experiment examined the relationship between the amount of Persian clover pasture offered to grazing cows and how full their rumens were at several times of the day and found increasing the amount of pasture offered, and thus the amount eaten, had no effects on rumen fill. This information will assist with the development of computer models that are capable of simulating the changes in intake and rumen fill over the day of cows in grazing systems.

Brazil is the world’s largest beef exporter and has the biggest commercial bovine herd. This study aimed at evaluating the development of the Brazilian cattle industry in the different regions and showed that it has migrated to Midwest and North. Fortunately the technology in the agricultural frontier has been adopted at the same rate as the cattle have migrated into it.

Rapid, short term estimates of methane production are needed to develop feeding management strategies to lower emissions, and to screen and identify low-emitting cattle. This study measured effects of intake and feeding frequency on the daily pattern of methane production in beef heifers fed lucerne silage, and showed a 6-fold variation in methane production rate at low intakes. This variation diminished as intakes increased, suggesting screening is best undertaken in well-fed, productive animals.

Milk production responses of dairy cows in early lactation grazing perennial ryegrass and offered supplements in different ways were investigated. Feeding supplements as a partial mixed ration (PMR) once a day did not result in any production advantages over the more traditional twice daily bail feeding system under the conditions imposed in this experiment. This information will be important for farmers feeding supplements as a PMR.

Beef breeding cows in New Zealand are inefficient because of their high maintenance requirements, but their efficiency can be improved by increasing their output of weaned calves. This experiment assessed Angus-cross-dairy cows relative to Angus cows and quantified the heterosis effects; beef-cross-dairy cows weaned heavier calves and showed heterosis advantages for milk intake and weaning weight of calves. The inclusion of beef-cross-dairy cows in beef breeding herds would increase production from those herds.

Plane of nutrition of the dam in pregnancy in a pastoral-based system can alter the ewe offspring’s mammary gland development and milk production at its first lactation and the liveweight of the grand-offspring. However, this apparent developmental programming effect on grand-offspring liveweight has not persisted. The present study aimed to determine if nutrition of the programmed ewe in pregnancy caused the variation in grand-offspring liveweight. However, the study found no effect of ewe nutrition on this response, under conditions in which ewes were either offered controlled or ad-libitum feeding conditions in mid- to late pregnancy.

Each country is committed in the reduction of greenhouse gases emissions through efficient actions. This study focuses on decreasing enteric methane emissions in cattle; two actions were selected (inclusion of unsaturated fats and nitrates in the diet) and the extent of abatement and cost were evaluated at country level. This work shows the possibilities and limits of the implementation of abatement actions.

The surprising findings in mice of an important role in energy metabolism of osteocalcin raised the question ‘why would a bone-specific hormone (osteocalcin) regulate energy metabolism’. We identify evidence to support a similar role for calcium and bone in energy metabolism of cattle to that found in mice. These relationships, identified in mice and cattle, and probably represent important adaptations of metabolism in mammals to the challenges of lactation.

When toxins produced by moulds are ingested by ruminants, the adverse impacts may range from sub-clinical effects to overt disease manifestations. This paper covers such effects which are not only witnessed at the farm level but which may also result in public health concerns should such metabolites be transferred into milk.

Researches in animal welfare are carried out in various disciplines (ethology, animal health, sociology...) that rarely exchange with each other. We argue that it is time to reinforce links between disciplines and develop interdisciplinary projects (between scientific disciplines) or even transdisciplinary projects (beyond scientific disciplines and with stakeholders) to address animal welfare in a holistic way and to be able to efficiently improve the welfare of animals.

Indigenous cattle species may possess traits that are beneficial in the face of declining global ruminant feed availability. The energy requirements for maintenance and gain of liveweight of Bali cattle, indigenous to Indonesia, were determined across a range of diets.

This study examined the dose-dependent supplementation effects of fermented-Monascus purpureus red rice (FRR) containing the natural lovastatin monakolin K and other secondary compounds on dry matter intake, rumen fermentation, body growth, animal safety and methane emissions. Although to our knowledge this is the first trial that reports the anti-methanogenic potential of FRR in cattle, it is recognised that tolerance and abatement efficacy are required to be assessed in the long term. Our findings provide a framework to assess potential additive opportunities for improving the environmental performance of livestock and develop further research.

Organic acids and their enantiomers (L-tartaric acid, D-tartaric acid, DL-tartaric acid, L-malic acid, DL-malic acid, fumaric acid and citric acid) were investigated at four concentrations (0, 5, 10 and 15 mM) using in vitro incubations for their methane mitigation potential as feed additives. None of the organic acids and their enantiomers were identified as potential mitigation agents.

Composite, bioactive packaging films developed from potato starch and chitosan as base material impregnated with antimicrobial substances nisin (60 000 IU/g) and cinnamaldehyde (0.5% v/v) extend the storage life of meat and meat products while keeping the product free from antimicrobial substances. These films inhibit post-processing surface spoilage and provide oxidative stability, leading to improvement in colour, flavour and maintenance of the sensory attributes during storage.

Marked variation exists between cows in their ability to maintain extended lactations which is partly regulated by hormones that affect nutrient partitioning. Growth hormone promotes milk production and persistency and was measured following infusion of insulin in dairy cows during an extended lactation, with the greatest response occurring in early-mid lactation. The insulin tolerance test could potentially be used to identify cows with greater growth hormone secretory responses and improved milk production.

Australian Merino bloodlines are known to vary in their wool production and potential for meat production, as such, the process of identifying more profitable bloodlines needs to consider the impact of wool and meat market price changes. This study defines the price risk profiles of Merino bloodlines which are influenced by fibre diameter and clean fleece weight, and to lesser extent bodyweight. By using this process, sheep producers have the capacity to identify more profitable and risk-efficient bloodlines.

The intake of pasture by sheep is influenced by its height. This study showed that the relationship between pasture height and mass differs between pasture types, but is highly variable within pasture types. Prediction of intake and liveweight change by sheep can be improved if appropriate pasture height for mass is used, and the relationships shown in this study may assist with the development of simulation models.

Feeding nitrogen in the form of nitrate, rather than urea, reduces methane emmissions by ruminants. This paper discusses why this particular abatement strategy may be considered attractive to the extensively managed, grazing beef cattle industry. The potential for adverse consequences arising from nitrate supplementation may be elevated in this environment, necessittating further investigation prior to this strategy being considered effective and safe.

Developing processes which reduce enteric methane production while increasing animal productivity has become critical for sustainable livestock production. Cysteamine hydrochloride, a naturally derived metabolic compound of cysteine, is capable of achieving both goals by reducing methane emissions while increasing wool growth and weigh gain in sheep. Therefore, CSH has the potential to meet the global rise in livestock product demand with a reduced greenhouse gas footprint.

Barrier function of the gastrointestinal tract (GIT) is an essential component of the innate immune system and for efficient nutrient transport. The objective of this study was to characterise the regional variation in the barrier function of the GIT in Holstein calves. This study indicates that the translocation of inulin across the omasum and rumen is greatest while the translocation of mannitol and G_t were greatest in the jejunum.

In Uruguay, spring-born lambs are weaned in summer, when native pastures present low energy and protein content. Some feeding alternatives, such as supplementation and grazing on summer annual crops (soybean and brown midrib sorghum) have been tested. Brown midrib sorghum is selected for its high energy content, and good responses have been obtained when protein supplements are supplied. However, protein supplements are expensive, and it is essential to determine performance response curves of lambs to increasing levels of protein sources.

Farmers in central Lombok Indonesia have uniquely integrated cattle fattening with intensive paddy rice production by planting the forage tree legume Sesbania grandiflora along the paddy bunds. This research provides the first detailed analysis of the production parameters of the system including: area of rice paddy and number of sesbania trees planted; harvesting and feeding practices; cattle purchases and sales; and monthly liveweight gain. This work has confirmed the high productivity of the feeding system and has highlighted the opportunity for its wider adoption, both in Indonesia and other regions in South-east Asia.

Subacute rumen acidosis (SARA) is a subclinical digestive disorder, which reduces welfare and performance (milk production, milk fat content, fertility) of dairy cows. A single measurement of the ruminal pH has been proposed to diagnose SARA, but our study supports the inconsistency between the ruminal pH 6 h after feeding and several markers of performance (milk yield and composition) and health status (large metabolic profile). Thus, more sensitive and specific rumen or metabolic indices should be investigated to identify herds at risk of SARA.

In the rumen of dairy cattle, fibre-rich feed such as grass is degraded by microbes, and products of degradation represent the major supply of nutrients to the cow. We evaluated the effect of rate of nitrogen fertilisation and grass maturity stage at harvest on rumen degradation, and found significant interaction effects. The present findings indicate that the effect of nitrogen fertilisation rate on nutrient supply to the cow is not constant but depends on grass maturity stage.

This study compares the partial genomic sequence of goat, sheep, cattle and water buffalo leptin (LEP) genes and evaluate the effects of the genetic variation at this locus on some metabolic, hormonal, and dairy traits in goats. All the four species showed a microsatellite region in Intron 1. Our data bring further evidence for the role of leptin as an indicator of metabolism and mammary gland health in dairy ruminants.

Holstein-Friesian dairy cows, identified as either efficient or inefficient for feed use during growth have been evaluated during lactation to measure changes in live-weight post-partum. The groups retained their divergence for efficiency during lactation, and post-partum live-weight losses were not affected by selection. Selection for efficiency should not affect tissue mobilisation, or contribute to consequences of excessive weight loss.

Previous modelling has shown that ewes with increased fecundity can increase production and reduce net farm greenhouse gas emissions. This study showed that a prime lamb enterprise incorporating high-fecundity ewes can also increase annual whole-farm profit compared with a baseline system typical of those in south-western Victoria. However, risk, or variability in farm profit, increased. Assuming higher fertility and weaning rates could be achieved consistently, ewes with high-fecundity offer producers the potential to increase profit with decreased emissions.

We hypothesised that as digesta retention time affects rumen microbial protein outflow, differences in digesta kinetics may contribute to genetic divergence in fleece weight of sheep. However, sheep of divergent genetic merit for wool growth differed in wool growth rate but not digesta retention time. Feeding level affected both wool growth and digesta kinetics consistently, irrespective of animal genetic merit.

Beef feedlot cattle, fed high-grain diets with limited forage content, often experience ruminal acidosis challenges, particularly when transitioning from a forage-based diet. As theorized, it was found that greater experience of ruminal acidosis resulted in a greater change in dietary selection for higher-fibre dietary particles. The results provide further evidence cattle will alter their diet selection behaviour in response to rumen discomfort.

The effects of restricting time at pasture on intake and performance of dairy ewes are poorly known. To fill this gap, a study was conducted in rotationally grazing milked ewes, finding that time restriction below 6 h/day and depletion of herbage quality at the end of grazing period constrained intake and milk performance. Further studies are needed to evaluate the implications of these results at system level.

Indonesian smallholder farmers require cost-effective and accessible supplements to increase the liveweight and body condition score of Brahman cows fed rice straw-based diets. Cows fed rice straw supplemented with cassava by-products plus urea or a tree legume, were able to gain liveweight and maintain a body condition score of 2.2 on a 1–5 scale. Better supplementation strategies are required for cows to maintain a higher body condition score.

The complex metabolic interactions that control efficiency of animal production requires the use of systems biology research and mathematical models. An existing metabolic model of metabolism in the dairy cow was expanded to include more detail in describing adipose tissue metabolism and reproductive processes. Changes in adipose tissue metabolism alterthe energy expenditure of the animal, which altered the degradation of steroids and changed the pattern of cyclicity.

Increased demand for red meat throughout the Greater Mekong Subregion (GMS) presents smallholder cattle and buffalo farmers with an opportunity to supply better-quality animals to expanding regional markets. Cattle were target-fed introduced forages in Cambodia to gain 0.19 kg/day and over US$60 in value compared with traditional cut-and-carry feeding practices where animals lost 0.04 kg/day. To increase supply for the growing demand for red meat, as well as poverty reduction, an ongoing, multi-disciplinary extension program should be a priority for livestock improvement programs in the GMS.

Methane emissions from ruminant livestock have increased five-fold over the past century, heightening efforts to investigate the mitigation potential of feed additives. This study found no effects of dietary essential oils on methane and carbon dioxide emissions from lactating dairy cows. Identifying dietary additives which can consistently reduce methane emissions without compromising animal performance is a primary focus of most mitigation strategies.

Biofuel industry generates vast amounts of plant by-products, including rapeseed cake (RC) and distillers dried grain with solubles (DDGS). The aim of study was to determine whether RC and wheat DDGS can be used as components of diets for rabbits. Our study demonstrated that 5% RC can be incorporated into rabbit dietary as a substitute of soybean meal. Because the productivity of rabbits fed 2.5% of DDGS (with 2.5% RC) was comparable to the 5% RC, the incorporation of up to 2.5% wheat DDGS to a diet should also be taken as a dietary option. The higher content of DDGS (5%) in the diet deteriorated the growth of rabbits.

The study was conducted to observe the impact of simulated heat-stress model on productive and adaptive capability of Malpura ewes. Compared with constant heat-stress models, the simulated model inflicts less severe physiological strain as evidenced by relatively lower changes in the heat-stress markers such as RR, RT and plasma cortisol. However, their growth and reproductive performance are compromised during the process of adaptation.

This paper is about the inclusion of ingredients of soybean origin in supplements and the frequency of supplementation of grazing cattle during the drier periods of the year, evaluating the effects on animal performance. The main finding was that frequency of supplementation did not affect the weight gain of cattle, but suggested that supplementation could be done 3 days a week opposed to daily, and would decrease production costs.

Path analysis was used to investigate effects of some morphological measurements on slaughter and carcass traits. The direct effect of bodyweight on carcass weight was the strongest and positively influenced (P < 0.01). Finally, the optimum multiple regression equation on carcass weight was found bodyweight as R² of 0.7463.

As an alternative to traditional weaning by abrupt separation, weaning beef calves in two stages by fitting nose flaps to prevent nursing before the final separation might reduce the stress response. Although two-stage weaning positively influenced the post-weaning behaviour of the calves and cows, the devices caused heavy irritations of the nasal septum. Therefore, the design of the anti-suckling devices and the period the devices are fitted should be modified in order to minimise nasal abrasions.

Milk harvesting is a fundamental component of dairy farming, requiring significant labour input. Consequently, with increasing herd sizes, there is a constant drive to improve milking efficiency. Explaining differences in milking efficiency by monitoring milking practices and the adoption of new technologies can, therefore, be beneficial to the industry. The results of this work indicate the use of technology was associated with greater labour efficiency but the potential benefits of each technology require careful evaluation to ensure appropriate selection decisions are made by farmers to meet their requirements.

The search for solutions to safeguard animal performance and health while reducing antibiotic usage currently attracts worldwide interest. While certain feed additives such as probiotics and phytogenics show promising results, tailoring additive combinations as part of an overall efficacious dietary strategy is largely undeveloped. Our results support the concept of sequential or throughout probiotic and phytogenic administration as being beneficial for broiler performance and broiler antioxidant status, worth of further investigation.

In the arid zones of Mexico young kids graze/browse together with their mothers on rangeland. It is unknown if goat kids discern between forages, therefore the aim was to find out if 4-week-old goat kids display an efficient foraging behavior. Kids ingested a diet richer in nutrients than mature goats; thus, herbage selection seems to be shaped by physiological effort.

The present paper reports on application of extruded full fat soybean (EFFSB) in broiler diet to identify its potential toward improving production performance criteria. The FFSB extruded at 170°C had acceptable protein solubility in KOH, indicating a good EFFSB. The latter in turn indicates an optimum balance between degradation of ANFs and maintaining the bioavailability of essential amino acids, hence having the potential to exert positive effect on blood metabolites and intestinal morphology of broilers at market age.

Plant extracts in ruminant diets might have beneficial effects on nutrient degradation in the rumen while mitigating methane production. In this study the main bioactive components of black seed (Nigella sativa) oil and of the root powder of Ferula elaeochytris were identified and their effects were investigated in an incubation system. No significant changes on nutrient degradation and methane formation were observed, possibly depending on the low dosages tested.

At weaning, the welfare of piglets may decrease because they are exposed to several stressors.

The objective was to assess the physiological response of piglets weaned at three different ages under two different trip conditions. Piglets transported immediately after weaning at Ages 8, 15 and 22 days present significant metabolic, hydric and gas exchange imbalances.

To improve the spermatozoa fertility, cryodamages must be decreased by using suitable diluents and cryopreservation. Therefore, the aim of this study was to investigate the effect of different levels of trehalose and glycerol on the freezing process of ram semen, when lecithin is used as cryoprotectant. It was concluded that simultaneous use of glycerol and trehalose had a desirable effect on motility of ram frozen–thawed sperm.

As protocols for oestrus synchronisation shortened the time of exposure to progesterone, CIDR devices were able to be reused; however, they can be a health risk. This study demonstrated that new and previously used (and autoclaved) devices are equally effective for synchronisation of oestrus and ovulation during the breeding season in goats. This approach decreases the cost of oestrus synchronisation program and makes it more economically feasible for producers.

Although myo-inositol is proportionately equivalent to phosphorus in phytic acid, its contribution to the observed beneficial effects of phytase in poultry and swine nutrition is obscure. Evidence is presented herein to show substantial increases in myo-inositol concentrations in the plasma of poultry in response to phytase addition. As myo-inositol has recently been shown to be an insulin-mimetic, links between insulin pathways, glucose uptake, protein accretion and exogenous phytase are drawn.

Rumen degradation of dietary proteins should be minimised using appropriate feed additives and/or technological processing. We hypothesised that supplementing dairy cow ration with monensin and roasting whole soybean seed improves microbial protein synthesized in the rumen; however, such an effect was not observed in the present study. Interactions between the type of technological processing and monensin supplementation should be further investigated

The αs1-casein is the most polymorphic milk protein and its genetic variants influence the quali-quantitative characteristics and the technological properties of the milk. This study investigates the genetic variability at the CSN1S1 in the Mediterranean buffalo. A significant association between the c.628C>T SNP and the protein percentage was found. This result offers useful indications for future applications of marker-assisted selection programmes.

The forage system is critically important to lactation performance in dairy cows. Our results suggested that the expression of IGF-1R in the mammary glands and the number of mammary cells is significantly affected by forage system, and this is closely related to the milk production in early lactation cows. This research provided the basis for better understanding of the molecular mechanisms of lactation regulation.

Under the conditions of intensive farming, it is very important to improve poultry health. The aim of this study was to investigate the effects of micro-encapsulated sodium butyrate (MSB)on oxidative stress and apoptosis in the intestinal mucosa of broilers and the main discovery was that dietary MSB can partially attenuate oxidative stress induced by corticosterone treatment and inhibit apoptosis of intestinal epithelial cells. This could confirm again that nutritional regulation of pre-slaughter stress through feed additives may provide a simple way to improve poultry health.

The effects of Cr in pigs have been equivocal. The aim of this study was to evaluate the effects of different-sized particles of CrPic in gilts; the results showed that small-sized particles CrPic improves carcass characteristics when pigs fed a high fat diet. Dietary supplement with small-sized particle CrPic can provide beneficial effects, particularly in high-fat diets.

Cattle fed nitrate risk methaemoglobinaemia, but with chronic feeding their red cells increase their ability to reduce methaemoglobin. In vitro studies suggest that phosphate plays a role in aiding the reduction of methaemoglobin and that the metabolic endpoint of red cells changes to maximise substrate availability for methaemoglobin reduction. It appears that both the animal and its rumen microbes adapt to nitrate feeding.

Beef producers in Korea try to increase marbling in beef muscles due to higher consumer demand towards such meat. Increasing marbling through extended feeding eventually burdens stakeholders of the beef industry and this study showed that medium (375–425 kg) carcass weight was optimal for achieving superior beef quality. Medium carcasses provide more health benefits at lower cost.

Excess salt in the sheep’s diet can impair digestion, but they may adapt to high concentrations in plants by reducing absorption. We found no evidence of adaptation, in fact their rumen developed a reduced ability to maintain a normal pH over time, with implications for accumulation of some elements in the brain and kidney. Thus farmers should beware exposing their sheep to high salt in their feed for prolonged periods.

Bituminaria bituminosa is a drought-tolerant, perennial legume that has been used for centuries as a part of the mixed sward in grazing systems around the Mediterranean sea and ‘cut and carried’ to feed as hay to dairy goats in the Canary Islands; varieties albomarginata and crassiuscula, commonly known as tedera, are native only to the Canary Islands. In south-western Australia, tedera will likely be directly grazed as green plants to help fill the feed gap in summer–autumn, due to its drought tolerance and capacity to retain green leaves. . Sheep fed fresh tedera exclusively for 34 days readily consumed the forage and remained in good health, they maintained their liveweight (42.5 kg) and body condition (condition score 3) throughout the experiment.

Feed costs are the largest single cost in any animal production enterprise with improvements in feed efficiency able to reduce feed costs. This study aimed to understand the basis for feed efficiency measured by residual feed intake and variation in maintenance requirements. The results obtained suggest that body composition, specifically fat deposition, is affected through inherent differences in feed intake or appetite rather than maintenance requirements.

Measuring blood stress indicators could be useful for improving animal welfare and meat quality. The current study measured various blood parameters from pigs under the standard pre-slaughter conditions using a portable analyser. Higher levels of blood lactate and glucose correlated with decreased pork quality. Therefore, measuring blood lactate and glucose could easily and quickly provide information about pork quality.

Whole-grain feeding regimes for chicken-meat production provide economic advantages by reducing feed costs while generating improvements in energy utilisation and feed conversion efficiency; however, the genesis of the performance improvements are not defined. The present paper considers the contexts in which these responses may be best realised. Identifying the drivers will enable the most appropriate WGF strategies to be adopted.

Accelerated lambing potentially increases biological efficiency of lamb production and affects seasonal patterns of feed requirements. Metabolisable energy requirements were used to calculate dry sheep equivalents (DSE) and showed that crossbred ewes in accelerated lambing weaned 16–47% greater weight of lamb per DSE over 4 years than ewes in traditional systems. The increased efficiency of accelerated lambing requires a more consistent feed supply throughout the year.

Tedera is a perennial pasture containing secondary compounds that has the potential to be utilised in the farm systems during the summer-autumn feed gap and reducing supplementary feeding. In our study, we showed that tedera was fermented without any adverse effects on digestibility or fermentability. These findings give further support for pursuing tedera as a fodder for growing regions of Australia.

Wavelet and linear regression methods were used to model time-of-day changes in behaviour due to available forage. The study concluded decreasing forage availability resulted in greater lying activity from 1000 to 1300 and greater grazing activity from 1300 to 2100. Understanding the dynamics between forage supply and behaviour could provide decision tools incorporating behaviour into drought management decisions.

Knowledge of genetic parameters of economic traits is very crucial to breeding plans. However, there is no information on genetic parameter estimates for many traits of Hainan Black goats. In this study, we estimated the genetic parameters of growth traits of Hainan Black goats using two different animal models of MTDFREML software. The results would greatly improve the breeding plans of Hainan Black goats.

The influence of pellet diameter and whole wheat inclusion on gizzard development and performance of broilers was investigated. Whole wheat and larger diameter pellets increased the energy utilisation and starch digestibility, but gizzard weights differed depending on the method of whole wheat inclusion. The data showed that improvements associated with whole wheat feeding cannot always be explained on the basis of gizzard development.

Ruminants ingest a diversity of forages, but in intensive feeding systems they are commonly fed single rations or pastures. The present study suggests that a diversity of flavours presented in the same ration has the potential to stimulate intake and alter eating behaviour in sheep. These effects may in turn contribute to enhance animal production and welfare.

The cost of feed is the largest recurring cost of producing beef. Inherited variation in feed efficiency is known and this experiment was to demonstrate the benefit in a large commercial feedlot of breeding cattle for improved feed efficiency. The results obtained confirm the feed saving advantages of inherited superior feed efficiency and that previously reported trade-offs in carcass traits, while confirmed, were minor.

The primary goal of this study was to assess the usefulness of rye-containing dry mixes (modern rye cv. Visello) for pig fattening. Feeding the mixes in which a proportion of barley was replaced with the rye grain has yielded significantly better results than barley-containing diets in terms of carcass quality and price. These observations warrant further studies of different rye cultivars to determine their utility in intensive pig farming.

We report the identification of five SSCP patterns in the sheep GH1 gene. The present study suggests a positive effect of SSCP patterns with carcass traits. We report the identification of two different protein structures in the GH1 protein. The identified SNPs in the GH1 gene could be used as molecular markers.

Pork makes a major contribution to worldwide meat consumption, and ways of improving meat quality are imperative. Variation in the rate of post-mortem pH decline is an important reason for variation in meat quality, but the mechanisms involved are not clear. In our research, we found that post-mortem energy status and metabolism might be important factors in the conversion of muscle to meat and might be important determinants of ultimate meat quality.

Dual-purpose wheat may be grazed by late-pregnant and lactating ewes during the winter in southern Australia. Results from two experiments with ewes grazing wheat crops during the lambing period identified that wheat forage may contain insufficient calcium, magnesium and sodium to meet ewe requirements. Providing a loose-lick mineral supplement to ewes can increase liveweight gain in twin-born suckling lambs.

A model of the sheep breeding industry examined the value of genomic information in sheep breeding programs. Benefits can be obtained by both the traditional three-tiered wool industry structure and studs using genomic information and selling directly to commercial producers, with most of the benefits retained by the commercial producers. The proportion of nucleus rams that use genetic tests must be optimised to achieve the maximum economic benefit.

The application of herbs and spice products as alternatives to antibiotics in raising broilers is receiving attention. The aim of this study was to evaluate the effect of cardamom seed and its essential oils on broilers and the results suggested that high levels of cardamom essential oils benefited feed efficiency and cholesterol metabolism. This could meet consumer demand for a safe feed additive.

The use of maize as a switch crop or the use of markets for roughage are the most efficient strategies to reduce financial risk of suckler cow farming. Applying a bio-economic optimization model we find that these strategies cause only low reductions of average gross margin. Our results also indicate that gross margin insurance is not attractive for farmers.

Algae are a novel protein source which could be grown on farm to provide a cheap protein supplement to cattle. Algae were compared to urea and sulfur as a nitrogen supplement and markedly increased intake and microbial protein production in cattle, more so than a simple urea and sulfur supplement. Algae are thus a new protein supplement which has the potential to markedly increase liveweight gain of cattle.

Effects of reduced dietary protein on performance and nitrogen (N) excretion were assessed to reduce the environmental impact of pig production. Pigs were given a control diet or a diet with reduced protein content, either with (LP1) or without (LP2) amino-acid supplementation. Compared with the control, N excretion was reduced (~18%) in LP1 and LP2, but the feed-conversion ratio was poorer, as was growth in LP2, but not LP1. This indicates the difficulty in maintaining consistently high performance when dietary protein levels are reduced.

Within mixed swards containing herbs and legumes, little is known about ewe grazing preference. Ewe diet selection and grazing preference was found to be intrinsically affected by species availability, access and palatability across seasons. Overall, a herb and legume sward may allow livestock to preferentially select specific plants to meet their nutritional requirements at a given time point.

Nutritional approaches targeting improvement of animal performance and disease prevention are currently warranted and in this respect the dietary intake of beneficial microbes termed probiotics is being actively researched. The level of probiotic inclusion in broiler diets was shown to be relevant for benefits in performance, nutrient digestibility, gut microbiota composition and metabolic activities. Generally, this study supports further the role of probiotics for an improved gut function and as effective alternatives to dietary antibiotic growth promoters used in broilers.

Pork meat colour stability may differ between conventional and organic (not free-ranging) pig husbandry systems due to on-farm differences in feed ingredients and space allowance. Most objective measures of pork colour during ageing differed between husbandry systems, but canonical discrimination between conventional and organic pork based on colour was not possible. Three days of storage combined the best pork meat colour and haeminic pigment balance.

Monitoring ewe liveweight may help farmers make more profitable decisions with regard to the management of their sheep flock. This review brings together the relevant literature demonstrating why sheep liveweight is important, and identifies and assesses available technologies for monitoring sheep liveweight. The findings suggest that walk-over weighing, an emerging liveweight monitoring technology, offers considerable potential to provide sufficiently timely and accurate flock average liveweight data to aid farmer decision making.

Oak acorns have some adverse effects on animal production, which arise from the presence of some anti-nutritional factors such as tannins and phenolic compounds. The aim of the present study was to evaluate the effect of different concentrations of ground oak acorn as source of hydrolysable tannin on growth performance of goat kids. The levels used had no adverse effect on growth performance.