Reduce Your Horse’s Gastric Ulcer Risk

Ulcers are a man-made disease, affecting up to 90 percent of racehorses and 60 percent of show horses. Stall confinement alone can lead to the development of ulcers. A horse’s feeding schedule also can be a factor. When horses are fed just twice a day, the stomach is subjected to a prolonged period without feed to neutralize its naturally produced acid. In addition, high-grain diets produce volatile fatty acids that can also contribute to the development of ulcers.

Stress, both environmental and physical, can increase the likelihood of ulcers, as can hauling, training and mixing groups of horses. Strenuous exercise can decrease the emptying of the stomach and the blood flow to the stomach, thus contributing to the problem.

The treatment and prevention of gastric ulcers is directed at removing these predisposing factors, thus decreasing acid production within the horse’s stomach. Follow these tips from the American Association of Equine Practitioners (AAEP) to properly treat your horse’s ulcers:

1. Allow free-choice access to grass or hay. Horses are designed to be grazers with a regular intake of roughage.

2. If the horse must be stalled, arrange for the horse to see the horses he socializes with. Consider offering a ball or other object that the horse can enjoy in his stall.

3. Feed the horse more frequently to help buffer the acid in the stomach.

4. Decrease grains that form volatile fatty acids.

5. Medications that decrease acid production are available, but are only necessary in horses showing signs of clinical disease or when the predisposing factors, such as stress, cannot be removed.

The prevention of ulcers is the key. Limiting stressful situations along with frequent feeding or free-choice access to grass or hay is imperative. Neutralizing the production of stomach acid is nature’s best antacid.


The American Association of Equine Practitioners, headquartered in Lexington, Ky., was founded in 1954 as a non-profit organization dedicated to the health and welfare of the horse. Currently, the AAEP reaches more than 5 million horse owners through its over 9,000 members worldwide and is actively involved in ethics issues, practice management, research and continuing education in the equine veterinary profession and horse industry.  
Permission for one-time use in printed media only is granted with attribution given to the AAEP and Nutrena.