The maternal environment during gestation and lactation affects foal health and growth. Obesity during lactation may decrease milk production and alter milk composition. Moderately obese pregnant and lactating mares have altered insulin and glucose dynamics relative to lean mares.

Growth is dependent on a higher rate of protein synthesis than degradation and in young animals, is largely attributable to the high rate of protein synthesis. The ingestion of food stimulates the synthesis of protein in skeletal muscle and this response is profound in early life. This feeding-induced stimulation of protein synthesis is crucial to support the rapid muscle growth during early postnatal life and the maintenance of body protein in adulthood.

Predictive growth models are unable to properly account for the effects of changes to body composition on the energetic efficiency of lamb growth and improving these models has been limited by the realities of data collection. By tracking changes in individual animal body composition, it is likely that better predictions of the effects of genetics, nutrition, and management on lamb growth can be made.

Stocker cattle are exposed to several stressors within a short period of time, which impair their immunity and lead to bovine respiratory disease (BRD). With the increased regulations regarding the use of antimicrobials in cattle nutrition, novel dietary strategies to improve health and productivity of stocker cattle are warranted.

Brewer’s dried yeast has a high nutritional value and has long been utilized by the animal feed industry as a source of protein, B-complex vitamins, and minerals. Because yeast is rich in polyphenols, mannanoligosaccharides, and β-glucans, it may also be used as a functional ingredient, providing benefits beyond that of its nutrient content.

The effects of the exposure to daily maximum temperature-humidity index (THI) and daily THI fluctuations (∆THI, maximum–minimum THI) around birth (−2 d, birth date [0 d], +2 d, and +7 d) on serum total protein (STP) and health of preweaned Holstein heifers were evaluated. Heifer calves exposed to small ∆THI (<20 units) at 0 d had greater STP compared with medium ∆THI (≥20 to ≤30 units).

Initial findings on genomic selection indicated substantial improvement for major traits such as growth or milk yield and even successful selection for secondary traits such as fertility or survival. However, recent unofficial reports indicate an increased frequency of problems in several secondary traits. This study looks at potential sources of those problems and mitigation strategies.

Beef cattle are exposed to several stressors during the initial days in the feedlot, which impair their immunity and lead to bovine respiratory disease (BRD). Strategies to mitigate stress upon feedlot arrival are warranted, including administration of the maternal bovine appeasing substance (mBAS).

In precision livestock farming, monitoring animal activity is crucial to ensure their health, well-being, and productivity. While digital cameras and computer vision algorithms offer a promising solution for this task, tracking individual animals of similar appearance when housed in groups can be challenging. Close interaction among animals can lead to a loss of individual identity, which affects tracking accuracy.

Calves are prone to growth retardation because of insufficient energy intake during the weaning transition period. Starch is the main energy source used in the formulation of calf starters. However, there is a concern that preweaned calves do not have sufficient functional rumen and small intestine to digest large amounts of starch, causing diarrhea, and decreased feed intake.

The Japanese black cattle, or Wagyu, are known because of its exceptional meat quality and its high degree of marbling. However, to achieve this condition, animals are fed with high amount of concentrate and over long periods of time. In order to decrease both environmental impact and economic profitability of Wagyu producers, feed efficiency may be improved.

Generally, beef heifers are managed on grazing pastures during early gestation, which are subject to fluctuations in forage quantity and quality. Variations in the nutrients available to the dam can impact the developing offspring during early gestation. Providing energy/protein supplements to grazing cattle is a method to ensure nutrient requirements are being met and to enhance the rate of gain.

In Australia, 53% of lamb deaths annually are caused by birthing difficulties, otherwise known as dystocia. Calcium and magnesium deficiencies in ewes during late gestation are suspected to be causing cases of dystocia. We evaluated a supplement that provided a negative dietary cation and anion difference which can influence calcium metabolism, and in turn, may reduce lamb death rates.

The cecal microbiota refers to a diverse community of microorganisms that play a crucial role in digestion, nutrient absorption, and overall gut health, influencing the well-being and performance of the host bird. In this study, we aimed to improve the health and growth of broiler chickens by exploring a unique approach called cecal microbiota transplantation.

Measures to quantify long-term or chronic stress in livestock are limited. The amount of cortisol (a stress hormone) deposited in the hair has been used as a noninvasive measure of long-term stress in some livestock species; however, few studies have investigated its use in young dairy calves. The objective of this study was to determine the efficacy of hair cortisol as a less invasive measure of stress in calves.

GreenFeed systems (C-Lock Inc., Rapid City, SD) are being increasingly used for measuring carbon dioxide (CO2) and methane (CH4) emissions and oxygen consumption (O2) of free-roaming cattle. These systems utilize averages of multiple visits to provide estimates of daily gas flux.

Herding dogs are extremely useful in handling all types of livestock. They are selectively bred for success in herding dog competitions, but the abilities which that to success in these are not always the same as those needed on a farm. To produce efficient herding dogs, other abilities therefore needed to be tested, via new trials.

Mulberry leaves (MLs) are rich in a wide variety of active ingredients and are also a kind of traditional Chinese medicine with the same origin as medicine and food. Previous studies have found that MLs may regulate lipid metabolism. But the exact mechanism remains unclear.

The American Society of Animal Science (ASAS) Public Policy Committee (PPC) is dedicated to influencing public policy and opinion on issues affecting farm and companion animals. Meeting monthly, the PPC sets goals and creates conduits to make federal agencies aware of the rich scientific expertise and resources within the ASAS membership. This expertise can be leveraged to develop science-based federal policies impacting poultry and livestock production.

Bison ranching in the United States includes a diverse portfolio of operation sizes and goals. Some ranches are as small as a few head operating as small-scale hobby farms and others are as large as several thousand head roaming on ranches extending beyond 1000 km2.