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My dog has diarrhea after switching food. What should I feed him?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 3 years and 9 months old | 80 lbs

Hi I went to the vet about a couple weeks ago because my dog had diarrhea. They put him on that g/I diet pet hills which eh did great on. As soon as I switched it over a period of time. He had diarrhea again. Then they told me to switch it over 2 weeks o I gave him the pet hills g/I again and he was doing well so today he finally switched back to the royal canine again and he had diarrhea. What should I do

1 Answer

Most Helpful Answer

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on October 29th, 2018

It is ok to stay on the Hill's diet long-term if that is all that Orcan needs to prevent diarrhea. If you want him on another diet, you can slowly mix the two over 3-4 weeks. The first week it would be 75% Hills and 25% RC. The next week 50/50, etc. If the diarrhea comes back you can try a different RC diet for sensitive stomachs, continue feeding just the Hill's, or discuss food allergies or other possible causes for diarrhea with your vet.

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