Instead of using choroplast and bedding, I made things a bit easier for both my rabbits and me. I used small outdoor matts from Target, because they are water proof, stink-free, they don't slip, and clean-up is a breeze (all you have to do is shake of the ex-ess litter and droppings and you're good to go!) Since the matts didn't cover the entire level, I had to get creative! I added 2 grids to the side, zip-tieing them halfway across the bottom grid, then stuffed them with hay! The rabbits absolutely adore their set-up!