Q. My cat is 14. He is very skinny. Has had blood chemistry done. All negative. No parasites.what would you think.

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A. I'd also recommend having his thyroid levels checked - if that wasn't done, and it's not typically part of a routine chemistry panel, so it likely wasn't - as an overactive thyroid can cause weight loss despite a good appetite in middle aged and older cats.

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A. Old age can lead to loss of muscle mass and fat, which may be what you are seeing. Muscle mass loss may not be recoverable, however feeding a more calorie-dense diet may be beneficial for keeping your cat in better shape. Treating any chronic health issues may also help improve overall health and help improve your cat's weight.

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