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Why is my dog's poop yellow after a new bag of his usual food?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 17 lbs

My dog has been passing yellow stools for 2-3 days now. We just bought a new bag of dog food about 3 days ago as well, but it's the same kind he always gets. Should we try a new food? Should we be concerned?

1 Answer

Most Helpful Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on November 6th, 2018

A change in food can sometimes cause the stool to change color slightly or become loser, however you did mention it was the same food, just a new bag. Checking to see if there were any ingredient changes between bags may alert you to a cause. A bland meal of boiled rice and chicken may also help with any minor GI upset while transitioning food. Other issues can include GI upset, parasites, illness, food allergies, etc, so if the problem does not resolve bringing in Joey along with a stool sample to your vet can help rule out some of these other issues and narrow down the cause.

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