I have a 10-month-old female Westie. She just came out of heat. Her stool is black, and she won’t eat. It has been eight days. What’s wrong with her? I took her to the vet, and they did x rays and blood work and tested her for other diseases. They found nothing.


This may be one of those medical mysteries. Black stools in dogs can be a sign of internal bleeding or a bleeding ulcer. Some dogs get black stools when exposed to rat poison. It may be worth seeking a second opinion by another vet or pursuing more testing as your dog sounds like she's doing poorly and not eating well. A referral to a specialist in internal medicine may also be insightful.

Updated on March 21, 2018

Original Article:

Causes of Blood in Dog Stool
By Adrienne Janet Farricelli