We use the litter made from recycles newspapers called Carefresh. Do you have a "bunny" litter box? They're triangle shaped, with two sides being nice and high - which must be so they don't scatter litter easily. Hoppy uses hers just fine, but her litter box is in her cage, so it's not on the floor where it would get stuff on the floor in that case. She also gets a layer of hay on top of the litter, and she LOVES to rearrange the hay - maybe your bunnies are just rearranging stuff?
We have her cage it in the laundry room where there is no carpet, so I just sweep up any loose hay with a broom. Hay, by the way, is death on vacuum cleaners - burns the motor right out.

[ December 10, 2001: Message edited by: Karen ]