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Why is my cat suddenly skinny and bony? Is it worms or something else?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered | 2 years and 8 months old

my cat has gone from a healthy waight to very skinny and bony and i am not sure why? i thought maybe worms but i can find no proof of worms since i have had pets with worms beofre what could it be?

1 Answer

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 10th, 2017

Poor Rusty! Cats can have worms even if you don't see them in the feces. Oftentimes, there are eggs in the feces, but those can only be seen with a microscope. Sudden weight loss in cats can also be caused by diabetes, kidney disease, systemic illness, infection, or injury among other causes. I would have Rusty seen by a vet asap, and bring along a sample of his feces for the vet to examine. In addition to looking at his feces, the vet can do a physical exam, blood tests, and a urinalysis to diagnose what is causing his weight loss. Once the cause of the weight loss is diagnosed, the vet can discuss treatment options with you.

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