In a previous post, I asked why Alice the lop was eating the paper towels in her litterbox. I have eliminated the problem by using a litterbox with a grid and pelleted litter underneath. The brand is Rooly. My rabbits started using the litterboxes soon after I rubbed the last of the dirty paper towels on the grid. The litterboxes, along with the Mrs. CleanHay racks, are cleaner than my previous setup. I will include links to Rooly and Mrs. CleanHay in the comments.