How Do I Know If My Horse Has Ulcers? (Signs, Causes & What to Do) How do I know if my horse has ulcers? Equine stomach ulcer disease is very common; more than 60% of adult horses get it, no matter how old they are, how well they perform, or which group they are in. … Continue reading How Do I Know If My Horse Has Ulcers? 7 Warning Signs You Should Never Ignore