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Why is my kitten throwing up and having diarrhea after food change?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 4 months and 1 day old | 3 lbs

I recently adopted two kittens about a week ago. Both runs of the litter. My smaller one, Lexa, has been having some trouble with food. We got the same kitten food she had in the shelter, and she has been throwing it up, and the volunteers at the shelter neglected to give us any information on this. Thinking it was a possibility that it was a dietary issue, we switched her to an organic grain free kitten food, and now, she has uncontrollable diareah. What suggestions would you have to help her?

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1 Answer

Most Helpful Answer

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Answered By Dr. Strydom, DVM

Veterinarian

Published on February 16th, 2019

I suggest you try using an oral probiotic. You must use one made for cats. I STRONGLY recommend this one: ( https://www.allivet.com/p-1890-purina-pro-plan-veterinary-diets-fortiflora-cat-supplement-box-of-30.aspx ) It comes as a box of 30 packets of powder. One packet per day over the food. I would use the whole 30 days. Also, please reconsider your use of a grain-free diet. They are not recommend for use unless there is a documented grain allergy (allergy testing done by a veterinary dermatologist). These diets have been shown to cause heart disease in dogs and it is unknown at this time if cats will show any side effects. I would not risk it. Hope this helps. Best wishes.

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