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My dog has diarrhea after switching to a 5-star grain-free food, why?

Updated On September 23rd, 2025

My boxer/Dane was eating Purina dog chow for a while. He is 2 years old and now I switched him to American Journey grain free food and he’s been having bag diarrhea. Before I bought the food I saw it had 5 stars and very good reviews. Can you please help explain why this would happen? Thank you!

1 Answer

Most Helpful Answer

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Answered By Linda G, MS, DVM

Veterinarian

Published on January 26th, 2018

Hello. It is strange to say from an internet source, but do not believe everything you read on the internet. I would switch your dog back to the Purina. It is one of the best foods from one of the most reputable companies out there. The only foods most veterinarians will recommend are the only companies that provide the proof & research that goes into making safe & complete diets. These are Purina, Science Diet & Royal Canin. You will never go wrong using one of their products. Thank you for using Petco Pet Education Center, formerly Petcoach.

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