there is only one cat litter I use - it's called SWheat - it's wheat based which means there is no clay to mess up my kitty's (six indoor furbabies) respiratory systems. The clay-based litters are not healthy for our kitties. It gets in their lungs and is unhealthy for the long term. SWheat holds the odors down and does not track all over my house. I buy it at WalMart.