Forgive me if I ramble. I'm not certain what I'm talking about. One of our indoor cats namely Brat has to be on a special cat food cause of his urinary tract(?). I can't remember what the vet said ...was it crystals that form there if he eats certain food. All I remember is that he cried when he used the litterbox and we took him to the vet. My question is what ingrediences(sp?) in cat food do we have to watch for? The reason I am asking is when we took our other cat, Tippy, to the vet for throwing up, she recommended putting him on a canned cat food that had no wheat products (It worked BTW). Problems is that Brat doesn't want to eat his ol' dry cat food when his brother is eating what he thinks is gourmet chow. I'd like to gave them both on cannned cat dood--not necessarily the same kind.