I went to the vet today. She says I have FUS. After I use the litterbox I scratch and scratch the sides, the bottom, the walls, the floor anything within reach and then I walk away and scratch the floor somewhere else. Dr. Wendy says I don't have any crystals but I might get some later. She also wants me to eat mostly canned food. *sniff, sniff* I like my dry food. What kind of food does your meowmie use to prevent crystals?