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Why does my dog get diarrhea when I change her food?

Updated on September 23rd, 2025

my dog has developed a intolerance to most dry food, she has in the past had mmms, pancreitous and has been treated with steroidsand since jan 2017 had diorehora no other symptoms. at the moment she is on a white fish and sweet potato diet and is doing fine , when I do introduce new things the dioreha returns

1 Answer

Most Helpful Answer

Oneal Bogan, DVM

Answered By Oneal Bogan, DVM

Veterinarian

Published on October 23rd, 2017

Hello.

It sounds like you dog has food allergies, which can cause the secondary conditions you listed.

Dogs with food allergies often cannot ever eat normal dog foods. If she's doing well on the fish and sweet potato diet, that's what I would leave her on because new food will flare her allergic response.

Also ask your vet about Apoquel. This is safer and more effective option than prednisone. This medication works just on the allergic response and is safe. I'd have your vet check her and see if that's right for her, as well as try a hypoallergenic diet like z/d of Ultamino.

Best to you and your dog!
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