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Why is my dog vomiting foul brown after eating the puppy's stool?

Updated On September 23rd, 2025

Pet's info: Dog | Labradoodle | Male | neutered | 65 lbs

Hello! My dog started puking earlier today. The smell was quite foul and smelled like poop. It was brown and with chunks and a mucus like texture. It also had patches of white foam throughout. He’s almost 5 now and the only recent change in his life is the addition of a puppy to the family. I’m worried he may be eating her stool. Aside from dehydration, what should I be concerned and aware of? Aside from behavioral changes and probiotics, what else does he need?

1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on April 12th, 2021

Vomiting is one of the most concerning symptoms a pet can have. It is a very non-specific symptom and can be a sign of almost any illness. I suggest you fast him for 8 hours. You can give one tablet of 10mg famotidine (Pepcid) now. After 8 hours there is no more vomiting you can start back feeding him his normal diet - 1/2 ration for about 2 feedings. And if still not vomiting you can then go back to normal. You can certainly start a probiotic gel like Ben-Bac even while he is fasting. Continue the probiotic for at least one week. https://www.petco.com/shop/en/petcostore/product/petag-bene-bac-plus-sensitive-digestion-gel-supplement-for-small-animals If he continues to vomit he really needs to see a vet. If you got a puppy and Buskin is eating the puppy's stool - he may have gotten intestinal parasites from that.

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