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My dog has red runny stool but is acting normal. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Greyhound | Female | spayed | 2 years and 4 months old | 63 lbs

I was out on a walk with my 2 year old greyhound when she passed a red runny stool. Otherwise she is acting completely normal - eating, drinking, urinating, happy, enjoying her walk. Do I need to take her in to the vet ER or would it be safe to monitor for a while. She only passed the one stool and the walk was a little over two miles.

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 5th, 2017

Poor Pollyanna! I would monitor her for now given that she is acting completely normal, and is eating and drinking. She could have intestinal worms, which does cause blood in the feces and diarrhea. Make sure she is up to date on her deworming treatments, and I would give her Panacur if she is not. She will need another deworming treatment in two weeks after the first to kill all the worms, and she should be dewormed every three months after that. It could also be due to something she ate or a sudden change in diet. Should she continue to pass bloody stool, or develops other signs such as vomiting, lethargic, and anorexia, then yes I would take her into the vet right away as the bloody stool can be a sign of something more serious like hemorrhagic gastroenteritis or a foreign body. Hopefully, however, she only has one instance of this bloody feces and has no need to go to the vet. I hope this helps you and Pollyanna!

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