Equine Gastric Ulcer Syndrome Basics

At Risk: Performance and Racehorses

Studies have found that up to 93% of performance and racehorses have equine gastric ulcer syndrome (EGUS). | Photo: Thinkstock

At Risk: All Domestic Horses

However, all domestic horses are at risk. Studies show between 11-37% of recreational riding horses also have EGUS. | Photo: iStock

Risk Factor: Weaning

An estimated 50% of foals and weanlings have gastric ulcers. Weanlings are susceptible due to the stress of being separated from their dams, as well as from changing diet during this life stage transition. | Photo: Anne M. Eberhardt/The Horse

Risk Factor: Highly Concentrated Diets

Grain-based diets with large, infrequent meals that are highly concentrated put horses at risk for EGUS. | Photo: Anne M. Eberhardt/The Horse

Risk Factor: Transportation

The stress of travel can be a contributing factor to EGUS in horses. | Photo: Anne M. Eberhardt/The Horse

Definitive Diagnosis

Gastroscopy is the only definitive way to tell if a horse has gastric ulcers. | Photo: UC Davis Center for Equine Health Horse Report

Forage First

The equine digest system is designed for foraging and grazing. Slow feeders or haynets can help lengthen the time horses spend eating, which can be an effective strategy for managing EGUS. | Photo: Courtesy Dr. Krishona Martinson/University of Minnesota Report

Forage First

Forage-based diets with frequent feedings are best for reducing EGUS risk. | Photo: Thinkstock

Alfalfa as an Antacid

Alfalfa is high in calcium, which can buffer stomach acid and offer relief for horses suffering from EGUS. You can feed alfalfa in hay, pellet, or cube form. | Photo: iStock

Prevention and Treatment

Ulcergard and Gastrogard (omeprazole) are the only FDA-approved products used to prevent and treat EGUS, respectively. | Photo: Erica Larson/The Horse