If your thoroughbred turns his nose up at his grain, you are right to be concerned. The quickest answer: thoroughbreds often stop eating grain due to dental pain, gastric ulcers, or feed boredom. Let’s walk through what you can check before calling your veterinarian.
Check for Dental Problems First
Thoroughbreds have small mouths and often develop sharp enamel points, especially if they race or train on a high-grain diet. Look for: dropping grain while chewing, tilting the head, excessive salivation, or bits of whole grain in the manure. Run your hand along the outside of the cheek – if your horse flinches, dental pain is likely. A routine float (filing) by an equine dentist usually solves this.
Consider Gastric Ulcers
Up to 90% of performance horses have some degree of gastric ulcers. Common signs: girthiness, poor appetite (especially for grain), grinding teeth, or mild colic after eating. If your thoroughbred is on a high-concentrate diet with limited turnout, ulcers are a strong possibility. Your vet can perform a gastroscopy for diagnosis. In the meantime, try splitting grain into smaller meals, adding alfalfa hay (which buffers stomach acid), or using a prescribed ulcer treatment.
Feed Texture and Type Matter
Thoroughbreds can be picky. If you recently switched grain brands or textures (e.g., from pelleted to sweet feed), your horse may refuse it. Try moistening the grain with warm water to make a mash – this softens it and can entice eating. Also check the smell: if the grain smells moldy, musty, or rancid (stale fats), toss it. Always store grain in a clean, sealed bin. Another option is to mix a small amount of a palatable supplement or soaked beet pulp to mask the new grain.
Environmental Stress and Routine Changes
Stress can kill a thoroughbred’s appetite. Recent changes in barn, rider, herd mates, or training intensity can cause temporary refusal. Ensure a consistent feeding schedule and a quiet, familiar eating area. If your horse is anxious, try a calming supplement or simply more turn-out time.
When to Call the Vet
If the refusal lasts more than 24-48 hours, or if you see signs of colic, lethargy, or fever, call your veterinarian immediately. Also, if dental checks and feed adjustments don’t work, suspect underlying issues like liver problems or chronic infections. Never force-feed a horse that resists grain – it can cause choking.
In summary: start with a dental exam, watch for ulcer signs, experiment with mash and feed texture, and reduce stress. Your thoroughbred’s grain refusal is often fixable with simple changes.
Key Takeaway
Check for dental pain and ulcers first, then adjust feed texture or reduce stress before calling your vet.