Kim, I'm so sorry to hear this. I hope that he'll start feeling better soon.

Does he not like any kind of canned food? If he does like at least one kind then I'd start feeding him some every day mixed with some water to help add even more moisture to his diet.

Storm would still have occasional crystal and UTI problems from time to time but now that he's been eating Innova Evo canned food 2 times a day mixed with a fair amount of water he's been doing great. This food has no grains in it and my holistic vet said that sometimes grains will cause urinary tract problems. I also give Storm some dry food too but he has to have his canned food daily to make sure that he gets plenty of moisture each day. Good luck.