He just had his annual check-up and is doing great. However, he was diagnosed with Hyperthyroidism. It is better for a cat to be diagnosed with this problem versus Hypothyroidism (which packs on the pounds).
We will have to give him two pills a day (which will be a lot of fun), for the rest of his life and also he has to go on a Renal Diet to help his kidney function as well. This diet consists of low protein and high fat.