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Why is my hyperthyroid cat uneasy after grooming? How old is she?

Updated On September 23rd, 2025

Pet's info: Cat | Himalayan | Female

Grace is on medication for her hyperthyroidism she doesn't put weight we had to increase the dose. we also had to shave her because of massive knots but she is very uneasy since she's back is this normal?. It worries me to see her like that. How can I also determine her age?

1 Answer

Most Helpful Answer

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Answered By Lauren Jones VMD

Veterinarian

Published on March 26th, 2017

Unregulated hyperthyroidism can increase metabolism, making it more difficult to gain weight. This can also lead to less grooming and an unthrifty coat in some cases. Your vet should be able to track Grace's T4 (thyroid hormone) level and regulate the dose of her medication accordingly. I typically recheck a T4 and kidney values 2 weeks after changing methimazole doses. Grace may have been a bit stressed from her grooming, causing her uneasiness. Unfortunately, once cats are fully grown there is not definitive way of determining age. Most cats that develop hyperthyroidism are older (usually 10-12 at time of diagnosis), so this might give you a very rough way of estimating Grace's age.

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