Thoroughbreds are elite athletes with high metabolic demands, so their diet must be carefully managed to support performance, health, and temperament. A balanced feeding plan is critical for these horses, as improper nutrition can lead to digestive issues, behavioral problems, or poor racing condition.
Our editorial team explains what thoroughbred horses eat, focusing on the unique needs of the breed. Their diet typically revolves around high-quality forage, concentrated grains, and targeted supplements to meet energy requirements for training and racing.
The Foundation: Forage and Pasture Management
Forage forms the basis of a thoroughbred’s diet, providing essential fiber for gut health. High-quality hay, such as timothy or orchard grass, is preferred. Thoroughbreds typically consume 1.5% to 2% of their body weight in forage daily, which for a 1,000-pound horse equals 15 to 20 pounds of hay.
Pasture access is beneficial but must be managed carefully. Thoroughbreds are prone to laminitis and obesity, so lush grass intake is often limited, especially for horses in training. Some owners use grazing muzzles or restrict turnout time to prevent overconsumption.
Concentrates: Grains and Commercial Feeds
To meet the high energy demands of racing and training, thoroughbreds receive concentrates. Common grains include oats, corn, and barley, often blended in commercial feeds formulated for performance horses. The amount depends on workload, typically 0.5% to 1% of body weight per day, divided into multiple small meals to reduce the risk of colic or gastric ulcers.
Thoroughbreds are prone to gastric ulcers, so diets often include alfalfa hay or other buffering agents. Fat supplements, such as rice bran or vegetable oil, may be added to increase calorie density without starch overload. Protein levels are moderate, around 12% to 14%, to support muscle repair without overburdening the kidneys.
Hydration, Salt, and Supplements
Thoroughbreds require constant access to clean water, especially after exercise. They may drink 10 to 15 gallons daily, depending on temperature and workload. Electrolytes are often added to water or feed to replace losses from sweating.
Salt blocks or loose salt provide essential sodium and chloride. Additional supplements may include vitamin E and selenium for muscle health, biotin for hoof quality, and joint support ingredients like glucosamine or chondroitin sulfate. However, supplements should be based on veterinary advice and forage analysis to avoid imbalances.