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Why is my horse's poop liquid, green, and watery? Is it diarrhea?

Updated on September 23rd, 2025

Pet's info: Farm Animal | Horse | Female | unspayed | 9 years and 7 months old | 1123 lbs

My horse Betsy has weird poops. They are not like solid poops, they are liquid green poops. She is old.

1 Answer

Most Helpful Answer

Dr. Strydom, DVM

Answered By Dr. Strydom, DVM

Veterinarian

Published on January 30th, 2018

Hello. Thank you for using Petco Pet Education Center, formerly Petcoach. Sorry to hear that Betsy is having this issue. At 9 years old she is not old. Horses can live to be 30 years old!! She is a youngster!

I suggest you get your vet out to check her. One of the most common reasons for diarrhea in a horse is intestinal parasites. She may need deworming. Other possibilities are:

1. bacterial colitis
2. stress
3. diet change
4. Potomac horse fever
5. toxicity
6. excessive sand build-up in the GI tract
7. enteroliths

Don't leave diarrhea un-treated for too long - this can make horses dehydrated and that will cause more issues.

Hope this helps. Best wishes.
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