Skip to main content

Q&A: Will a Dog With IBD Get Sick After Eating Cat Food?

  • Author:
  • Updated date:

Dr. Mark is a veterinarian. He has been working with dogs for more than 40 years.

For dogs with IBD, certain common ingredients in dog and cat food can upset  their stomachs.

For dogs with IBD, certain common ingredients in dog and cat food can upset their stomachs.

Will Cat Food Make My Dog's IBD Flare Up?

"My dog has IBD and just ate some cat food. She had a flare last week and is still on prednisone. Is she going to get sick again? What should we do?" —Susan

Back to Square One

This happens all the time when dogs are on a special diet, so please do not be too angry with your pet. If she was already on a special hydrolyzed or novel protein diet, unfortunately it means that you are going back to the beginning, before you placed her on a special diet. (1) If your dog was on a novel protein diet, then you have to start counting from the day after she ate the cat food.

Scroll to Continue

Read More From Pethelpful

She may or may not have another flare-up of her condition. It really depends on what the ingredients were in the cat food and whether she is sensitive to them. If the cat food was made with fish, it is probably going to be okay, but she may be sensitive to chicken, beef, or one of the other ingredients commonly found in cat food.

Continue With the Prednisone

There is not much else you can do but continue with the medications that were prescribed by your veterinarian. If she passes blood in her stool or starts vomiting, please contact them so that she can be seen.


  1. Dandrieux, J., & Mansfield, C. S. (2019). Chronic Enteropathy In Canines: Prevalence, Impact And Management Strategies. Veterinary medicine (Auckland, N.Z.), 10, 203–214.

This article is not meant to substitute for diagnosis, prognosis, treatment, prescription, or formal and individualized advice from your veterinarian. Animals exhibiting signs and symptoms of distress should be seen by a veterinarian immediately.

© 2022 Dr Mark

Related Articles