Colitis refers to inflammation of the colon or cecum, and it can lead to sudden, severe diarrhea in horses. This condition is not only uncomfortable—it can become life-threatening due to dehydration and the risk of endotoxemia.
What Causes Colitis and Diarrhea?
- Sudden changes in diet or forage quality
- Stress, illness, or overexertion
- Antibiotic use or NSAID overuse
- Contaminated water or spoiled feed
- Bacterial, viral, or parasitic infections
Warning Signs
- Frequent, watery manure
- Fever and elevated heart rate
- Lethargy or signs of colic
- Darkened gums or signs of shock
- Loss of appetite or dehydration
When to Call the Vet
Any case of diarrhea lasting more than a few hours—especially with fever or lethargy—should be treated as a medical emergency. Horses can lose fluids and electrolytes rapidly, increasing the risk of systemic inflammation and organ failure.
Prevention Tips
- Make feed changes gradually over 7–10 days
- Keep water sources clean and uncontaminated
- Monitor manure consistency daily
- Support gut health with good forage and turnout
- Follow proper deworming and vaccination schedules
Why It Matters
Colitis can escalate fast—but with early intervention and smart barn management, many cases can be avoided or resolved quickly. Know the signs, act early, and keep your vet involved every step of the way.
