We have two cats. I have found the litter at Costo to be the best for us. We also use a citrus spray or powder that works wonders too. I think it's called Purrfet Litter. It's about $7. for a 30# bottle. It beats all the others I've tried. I also clean it every other day. I think that's the main thing. If their box is full, they find a carpet - not even a washable rug. We travel in a 37' 5th wheel for several months a year and smells travel fast. Since the box is under the dining table, it is very noticable when it smells. Some litters I have used, broke the scoop, others don't stay clumped. This clumps nicely. Hope this helps. ;)