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.

Swine were introduced into the United States by early explores and settlers for food and it was not long after that feral populations became established from free-ranging animals and escapes from confinement. Then in the early 1900’s the Eurasian wild boar was introduced for sport hunting. Consequently, feral swine today are a mix of domestic pigs, Eurasian boars and hybrids of the two.

The road towards the declaration of an International Year of Rangelands and Pastoralists (IYRP2026) by the United Nations (UN) was a long one. The idea was first discussed at the International Rangeland and Grassland Congress held in Hohhot, China in 2008. Facilitated by the Rangelands Partnership and the Society for Range Management, the creation of an International Support Group in 2015 helped provide a stronger global focus as well as the integration of social and cultural dimensions.

According to the Federal Emergency Management Agency, a wildfire is “an unplanned, unwanted fire burning in a natural area, such as a forest, grassland, or prairie. Wildfires can start from natural causes, such as lightning, but most are caused by humans, either accidentally or intentionally. Wildfires can damage natural resources, destroy homes, and threaten human lives and safety”.

The effects of dietary replacing corn silage (CS) with a mixed fodder beet tops-wheat straw silage (BS) on feed consumption and milk production efficiency, milk chemistry, estimated microbial-N synthesis, blood chemistry, and the blood and milk antioxidant status of lactating Holstein cows were assessed.

Intrauterine growth retardation (IUGR) is defined as the restricted development of the mammalian fetus or its organs during pregnancy, which has high morbidity and mortality during the perinatal period and improves the risk of metabolic diseases in the long term. Dihydroartemisinin (DHA) is a derivative of artemisinin that possesses anti-inflammatory and immunoregulatory effects.

As obligate carnivores, free-ranging felids consume prey and rely on nutrients from animal organs. Studies in adult carnivores such as domestic cats have demonstrated the importance of the dietary amino acid profile. Therefore, this research used rats as a small prey model to analyze the amino acid composition and digestibility of whole prey and its body organs through in vitro digestion methods.

Seminal plasma is the fluid portion of the ejaculate that is routinely removed or significantly diluted when preparing semen for artificial insemination. Seminal plasma has been shown to elicit changes to the tissues of the uterus at the time of insemination that improves pregnancy outcomes in rodents and swine.

Mastitis is an important disease with economic and welfare implications in both clinical and subclinical states. This research described the microbial diversity and taxonomy of milk collected from clinically healthy Rambouillet (WF; n = 9) and Hampshire (BF; n = 5) primiparous ewes in a longitudinal study involving differing dietary zinc concentrations

The insect-rearing industry, which involves the large-scale commercial growth of insects, is growing in developed nations, including the United States, to meet human food and animal feed demands. As the industry grows, there is increased interest in using black soldier fly larvae (BSFL) as a sustainable protein source for livestock feed.

Automated head chamber systems (AHCS) implemented into beef cattle research allow estimation of gas flux, heat production (HP), and calculated gas-adjusted dietary net energy for maintenance (gaNEm) and gain (gaNEg) values when paired with recovered energy. However, a comparison between AHCS-derived values and performance-adjusted NEm (paNEm) and NEg (paNEg) from either live performance (live paNEm and paNEg) or carcass data (carcass paNEm and paNEg) has not been conducted.

Donkeys assume relevant economic importance in several countries worldwide. However, the genetic structure of these populations is less investigated compared to other species. The aim of this study was to investigate the genetic background of nine different Italian donkey populations.

Zearalenone (ZEN) is an estrogenic mycotoxin that impairs fertility in swine. This study was designed to identify the ovarian molecular impacts of ZEN exposure in thermal neutral (TN) pre-pubertal pigs. Additionally, whether heat stress (HS) would affect the ovarian ZEN response was also queried.

The objective of this research was to determine the influence of long-term supplementation (258 d) of a direct-fed microbial (DFM) and/or yeast cell wall (YCW) product on bacterial populations in beef steers. Collectively, there were no appreciable treatment influences on bacterial populations.

To mitigate stress caused by inevitable management practices and to enhance cattle health, a preconditioning program is recommended from weaning to feedlot entry. This experiment evaluated the effects of multiple bovine-appeasing substance (BAS) administrations during a preconditioning program followed by feedlot receiving on productivity and health.