Catty, he's been on Hills, Royal Canin, and Eukanuba. I think the only one he hasn't tried is Purina's veterinary diet. The one he liked best was the Royal Canin. Everyone likes the RC maintence so thats what they are all on.

He HATES the crystal reduction food, whether its dry or wet. He gets a handful of it every night. I feed him the special diet before anyone else gets their food.... he looks at it for 15 minutes before he decides to eat it. Meanwhile. 4 other cats and a huge dog stare at him because they know as soon as he finishes his food they'll get theirs. I learned long ago that if I feed him at the same time as everyone else that he will walk away from his food and bump somebody else away fro theirs. And nobody has interest in going up to his bowl with the crystal reducing diet in it. They all hate it.