Hi There,

Welcome to CatHobbyist!

A 2 pound weight loss is definitely a reason for concern in any cat. This goes double for seniors, as they are prone to many health problems that can cause loss of weight such as kidney disease, hyperthyroidism, and diabetes. It was a very good move to send the blood to Cornell, especially for the thyroid test. Many of the regular labs are not accurate when it comes to thyroid testing in cats.

I highly recommend letting the vet get a urine sample, even if it would mean leaving your kitty for a few hours. This is because a vet or technician can get a sterile sample, which you can never get at home. A sterile needle and syringe would be used to get urine in the hospital, so that if bacteria is present, the vet would know that it was from the urine itself, and not another surface (such as a litterbox).

I think it's a really good thing that your vet is taking this weight loss seriously. Even if nothing specific is found in tests, a lot of problems will be ruled out. Still, normal bloodwork does not mean a cat is healthy, so if your vet recommends further diagnostics such as an ultrasound, I would go for it.

Take care, and please let us know how things go.

Regards,
PHKitkat

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