My cat has diarrhea right after eating new food. Should I go back?
Updated On September 23rd, 2025
Pet's info: Cat | Mixed Breed | Male | unneutered | 4 months and 16 days old | 4 lbs
My cat seems to poop immediately after everytime he eat S but the stool is almost water like i recently changed his food. Should i go back to his old brand?
5 Answers
Most Helpful Answer
Published on July 14th, 2017
Hi, I'm Dr. Johnson. Thanks for using Petco Pet Education Center, formerly Petcoach! Poor Peaches! Diarrhea can be from a sudden food change and intolerance to the new food. If you changed the food abruptly then he just may have not had time to adjust. I would recommend changing him back to the original food until his stool is normal then if you still want to try the new food, change it slowly. If the diarrhea returns he can not tolerate the new food. Other causes of diarrhea in young kittens are parasites, viruses and bacterial infections. If the diarrhea persists, he starts vomiting or stops eating he should be seen by your Veterinarian! Good luck!
2Pet Parents found this answer helpful
Related Answers from Veterinarians
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Published on July 21st, 2020
Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. The diarrhoea is likely caused by abrupt change in her diet. It will not make Cleopatra prone to bacterial or viral infections as long as you keep her indoors and away from other cats. The diarrhea will possibly be self-limiting and your kitten should be back to normal in 2-3 days. However, if she continues to pass watery stools or starts to vomit, you should get her checked over by your local vets.
1Pet Parents found this answer helpful
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Published on June 16th, 2018
Hi, thanks for using Petco Pet Education Center, formerly Petcoach! Did your Vet give you any medications for the diarrhea? Personally I recommend stopping the new food and go back to the old food if it causing diarrhea. Has Skye's stool been tested for intestinal parasites and has she been dewormed? The diarrhea may not resolve if she is sensitive or allergic to this new food. I would switch her back to the old food and once her stool is normal, slowly add in the new food to see if the diarrhea returns. I wish you the best!
1Pet Parents found this answer helpful
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Published on July 14th, 2017
Certainly a sudden change in diet can cause diarrhea in kittens, and it's good that Peaches has no bloat and his stool is getting more solid. I would keep feeding him the small pieces of cooked chicken in with his old brand of food for the next couple of days. If his diarrhea clears up completely, feed him his old brand of food only. Should the diarrhea come back, I would take Peaches into your vet for an exam.
1Pet Parents found this answer helpful
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Published on September 6th, 2017
Diarrhea can often occur secondary to an abrupt food change. In some cases removing the offending food is enough, but other times medication may be necessary to help restore normal balance of the G.I. tract. I would recommend getting some probiotics for Snirt (most vets and some petstores should have probiotics for cats). If he is eating and drinking well, with no vomiting then give it another one or two days with his regular diet and adding in the probiotics. But if his diarrhea is worsening, he has any vomiting or stops eating then I would recommend a veterinary visit. I hope Snirt is back to normal soon and thank you for using Petco Pet Education Center, formerly Petcoach
1Pet Parents found this answer helpful
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