In the mitochondria, complexes I and III of the electron transport system (ETS) generate reactive oxygen species (ROS) during exercise that are reduced by antioxidants to mitigate oxidative stress. Among these antioxidants are thiol-based antioxidants such as glutathione as well as coenzyme Q10 (CoQ10), which also transports electrons from complex I and II to complex […]

Skeletal muscle citrate synthase (CS) activity serves as a marker for muscle oxidative capacity. CS activity was compared among Quarter Horses (QH), Arabians (AR),  Thoroughbreds (TB), Standardbreds and Warmbloods at various ages and stages of training. Gluteus medius muscle biopsies were obtained at ages 6–23 m (n = 10), 2 y (n = 37), 3 […]

In combination with exercise, nutrition is an essential component of managing horses with myopathies. The optimal feeding program for an individual is tailored to the diagnosis of a specific underlying myopathy. Exertional myopathies are defined by muscle pain and impaired performance during or after exercise. Exertional rhabdomyolysis (ER) represents a subset of exertional myopathies characterized […]

Research into the growth and development of Thoroughbreds managed on commercial breeding farms is reviewed in this paper. Because horses are not meat-producing animals, less research has been performed quantifying growth, muscle, and bone development than with other production animals. However, variations in growth and development are linked with both value and wastage in young […]

Proton pump inhibitors like omeprazole reduce nutrient digestibility in humans. This study determined the effect of omeprazole on the digestibility of diets containing limestone or marine-derived calcium (BMC) and to assess changes in blood parameters associated with gastric acid production and calcium status in horses. Thoroughbreds were used to evaluate the digestibility of diets containing […]

Bone density and strength are important for the long-term health and soundness of performance horses. Marine-derived mineral complexes improve bone density and strength in laboratory animals and humans. Additionally, nutrients without established requirements in horses, such as boron, silicon and vitamin C, may affect bone health. This study evaluated the effect of feeding a supplement […]

Omeprazole (OM) is a proton pump inhibitor (PPI) that inhibits gastric acid secretion in horses and is the most popular treatment for EGUS. PPIs are also widely used in humans to treat acid-related conditions and have been associated with a reduction in the digestibility of several nutrients, including protein, fat, calcium (Ca) and iron. This […]

Held every four years since 1990, the FEI World Equestrian Games (WEG) are the major international championship for eight equestrian disciplines. Although the 2010 and 2018 editions of WEG took place in the U.S., the majority of the horses competing came from Europe and were fed feeds made by European manufacturers. In 2010, Kentucky Equine […]

When a horse arrives at a veterinary hospital, several nutritional or feeding challenges may be encountered. Feeding programs should aim to avoid weight loss, unless it is required for a specific condition (e.g., equine metabolic syndrome). Negative energy balance can lead changed intestinal microbiota, reduced immunity, and increased incisional complications. Some horses with peracute or […]

Horses have evolved over millions of years as roaming grazing animals, and they have specialized digestive tracts adapted to digest and utilize diets containing high levels of plant fiber. They are capable of eating and processing large quantities of forage to meet their nutrient demands. In an attempt to maximise growth or productivity, horses are […]