Nationwide events find
all horses at risk for EGUS.

Horse Stomach

Gastroscopy events at veterinary clinics and university campuses in 25 states identified stomach ulcers in a surprising number of horses:1

  • 658 total horses participated.
  • Horses from 1 to 41 years old were identified with stomach ulcers.
  • 254 horses that were diagnosed with stomach ulcers had no previous history of ulcers.
  • Horses with stomach ulcers were stabled in a wide range of environments, including box stalls, pipe stalls, a pasture alone and a pasture with other horses.
  • Horses fed supplements like beet pulp, flaxseed and corn oil were still identified with stomach ulcers — regardless of the discipline (click the individual discipline links in the table below for more information).
Stomach ulcer prevalence by key disciplines
Racing 92%
Show Jumpers 67%
Harness 86%
Eventers 62%
Saddleseat 82%
Hunter Jumpers 60%
Reiners 76%
Barrel Racing 51%
Cutting Horses 69%
Dressage 44%

What scoping reveals.

When diagnosed by a veterinarian with an endoscope, stomach ulcers are graded from 0 to 3.

Grade 0
Healthy Stomach
Healthy, nonulcerated stomach lining*
Grade 1
Healthy Stomach
Mild ulcers, small lesions (damaged tissue)
Grade 2
Healthy Stomach
Moderate ulcers,
large lesions
Grade 3
Healthy Stomach
Extensive lesions, deep ulceration and bleeding

 

1Data on file at Merial.