Pizza crust wont hurt him if there's no garlic or onion on it. That's one of my cat's favorite treats! You can even leave a little sauce and cheese on it for him.
A little belly wont hurt anything, morbid obesity can though. You just have to find a balance. A good rule is, if he starts to have trouble licking his own bum because he's too fat to reach, it's time to diet! Phaewryn http://ucat.us Adopt a New England FIV+ cat: http://ucat.us/FIVadopt.html Special Needs Cat Links (and feline info library): http://ucat.us/domesticcatlinks.html