Catalyst Multi-Cat formula was just what I was searching for when I took in a pregnant cat in need. Soon we had 6 kittens and knew that an effective litter was going to be essential. The kittens had no problems using the litter box with the Catalyst litter. There is little litter wasted when scooping and it has good odor control. With 6 kittens, there is some tracking of litter, but it is easily removed with a hand held vacuum. I'm very pleased with this Earth friendly option. I will not use any other brand! Thank you for making my first time fostering cats a much more pleasant experience.