Quote Originally Posted by Fuzzybuns
Tidy Cats Scoop for Multiple Cats with Tidy Lock is what I use.
It's what I use, too, and it actually smells good, rather like lilacs. It really keeps the odor down except when Pidge does a #2. She scratches frantically but never seems to cover anything. I have 7 cats, 9 litter boxes and it works for me.