Hm, I have a kitty like this too. Both kittens have been on the same food (Natural Balance http://www.naturalbalance.net/catformulas/UltCat.html ) since I got them, and one of the kittens (almost a year old) always stinks the place up. It's not like that at all with my other cat. You can tell from the other room who is in the litter box....and then the stink follows him! It's not a food change issue or anything, as they have been on a mix of the wet and dry versions of that food since Oct. at least. I'm at a loss, and my cat stinks! Let me know if you get your kitty to stop stinking!!