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My new rescue dog has diarrhea with red mucus. What should I do?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 3 years old | 14 lbs

I recently adopted a rescue dog. The first day home he barely ate. Day 2, he started to eat a little. Day 3 he has diarreha dark and once with red jam looking mucus. A few hours later it was a peanut butter brown. He is eating more. Note he is on meds for anxiety daily. Should I be concerned or wait until he gets settled in.

1 Answer

Most Helpful Answer

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Answered By Dr. Elizabeth

Veterinarian

Published on January 23rd, 2019

With these pups, there is always a potential for parasites or bacterial overgrowth to cause the symptoms. I would recommend to get Parks in for an exam and to have the stool checked for parasites. That is usually a good sign if you don’t see any more blood, which is what I’m concerned you were seeing in the stool. It’s better to be safe and also to make sure he doesn’t have any parasites to spread to his new human family. There are other causes for blood in the stool as well and these can vary from a new diet to internal organ damage. The first step is to rule out the most common things. I hope this is helpful and please feel free to post any additional questions.

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