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My cat is thin, eats a lot, breathes fast. Is it hyperthyroidism?

Updated On September 23rd, 2025

Pet's info: Cat | Persian | Female | unspayed | 1 year and 5 months old | 9 lbs

Hi. I adopted a cat three days ago which is 1.5 years old. She is so active and friendly and too thin too. It has been eating so much_about five meals a day which is a 6 oz can. It is breathing so fast and I am afraid it has hyperthyriodic disorder. Apart from this Loli is quite normal and so lovely cat. BTW. It has given birth recently and was nursing. Thanks for your time and help.

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on August 18th, 2019

Loli is gorgeous! Given she gave birth recently and was nursing, that may be why she is so thin, especially if she didn't get a kitten diet when nursing. Hyperthyroidism is common in senior cats, not cats her age. Keep feeding her as much as she wants so she gains weight, and I would feed her dry food as well. Best of luck.

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