Sammy is such a big fuzz nugget; how handsome! I'm so glad that he's doing better. I do hope that your vet will give you some amitryptilene for him. It's really inexpensive and it does work from what I've read of the experiences here on PT. I've not had to deal w/crystals w/my cats (just about everything else but not that LOL) but I can sympathize w/you. Give Sammy some head scritchies for me.