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Why is my senior cat eating less and losing weight but not sick?

Updated on September 23rd, 2025

Pet's info: Cat | Mixed Breed | Male | neutered

My cat is eating, but significantly less. We have tried everything to increase his appetite... He's lost weight, but has no other symptoms of being sick (no vomit, no diarrhea, he hasn't lost any hair...) he is normal aside from that. I got him to eat some chicken in broth. He was a stray, and the clinic says he is about 12 years old. What could be wrong with him if he is not sick? Is he just old? We're taking him to the vet this week, but I was hoping for suggestions in the meantime.

2 Answers

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on January 11th, 2019

In an older cat, my first thought would be dental disease. This would be painful for Krinkle, cause him to eat less, and subsequent weight loss. It could also be that he has diabetes, kidney failure, or hyperthyroidism. Having him seen by a vet this week is a good idea. I hope this helps!
Vote Icon1Pet Parents found this answer helpful

Related Answers from Veterinarians

  • Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on July 3rd, 2019

    Lethargy and anorexia are signs of many illnesses, and Nikko could have heart disease, liver disease, kidney disease, diabetes, hyperthyroidism, or even cancer causing his symptoms. It's actually very serious when a cat won't eat, so I would take him into a vet immediately. Best of luck.

    Vote Icon

    1Pet Parents found this answer helpful

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