Kim, I'm so sorry to hear that Pouncer has crystals again. I've been going through this with Storm too and he seems to be fine as long as he's on his special diet. I was a very bad meowmie and let him eat another diet for a while and then he developed crystals again. I feed all of my cats the Royal Canin S/O diet and this is supposed to help both struvite and calicium oxalate crystals. I feed them both the wet and dry food and they all love it. Here's a link to it: Royal Canin S/O diet. It is expensive but I think it's very much worth it to keep my cats healthy. Good luck.