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My kitten ate sauce with onions and has diarrhea. What should I do?

Updated on September 23rd, 2025

Pet's info: Cat | Ragdoll | Male | unneutered | 3 months and 18 days old | 3.5 lbs

Hi I suspect my cat ate some sauce with onions in it yesterday and I am 99% sure it did not eat any onions. He is a 3.5 month old ragdoll. Should I be worried about this? He started having loose stool/ diarrhea for 2 times already after this incident.

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on July 10th, 2019

I suspect the sauce is causing the diarrhea, and not likely the onions. There likely wasn't enough onions to cause issues. I can give you a home remedy for Maru to see if it helps. Withhold food for 6 hours, then feed a bland diet of boiled white meat chicken (no bones) in small amounts several times a day for a couple of days. Then slowly add back in his normal diet. If the diarrhea continues on the bland diet, he starts vomiting food, stops drinking water, starts vomiting water, or becomes very lethargic, he will need to see a vet right away. Best of luck.
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