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Why is my slim 4-week-old kitten's belly big and he's not playing?

Updated On September 23rd, 2025

Pet's info: Cat | Domestic Shorthair | Male | unneutered | 24 days old

My 4 week old kitten is fairly slim, except for the bottom of his stomach which almost grazes the floor. It's not hard to the touch, but it is so large it seems concerning. He seems okay most of the time, but when his brothers and sisters are playing he will stick to the sidelines. I'm very worried, should I immediately take him to the vet?

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on April 23rd, 2018

It could be that Tubby is suffering from intestinal worms, causing him to be slim but have a big belly. Because it's so large that you are concerned, I do think a vet visit is a good idea. As long as he is eating and drinking, and going to the bathroom normally, you do not need to rush him into vet. I would call the vet today to make an appointment for him to be seen this week however. Best of luck, I hope this helps!

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