Your cat is so cute! I've never said that to any other cat owner from fuckyeahfelines because I love all cats, but yours is such a cute chubby guy that I couldn't resist :) I have a little fatty (said in a loving way) at home too, but as long as he's happy and healthy, I think it's alright.
Fatty cats rule!
Your cat is too fat. Make him go on a diet or he can die sooner than he should..
I understand your concern, but Waldorf is already pretty old for a cat. He eats no more than any other cat and he spends every day purring and getting love from his family.