I use Yesterday's News. It's not "clumping," but the pellets swell when damp and can be scooped with a slotted scoop. Great odor control, light & easy to carry, and no dust.

When Smudge first moved in, he used Feline Pine. It would have been fine if I had hardwood floors, but I have carpets, and it just ended up everywhere. Yesterday's News doesn't get tracked around as much.

Love, Columbine