Q. My cat is 14. He is very skinny. Has had blood chemistry done. All negative. No parasites.what would you think.
DR. CHRISTIE LONG, D.V.M., C.V.A.
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.
JESSICA L DESROSIERS
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.