I use newspaper in the litter trays of Madelyn (her long hair catches other litter materials) and Raven (he eats litter materials which worries me). Madelyn is mostly white, so she will pick up newsprint on her feet. Raven is black and he does not sit in his box as much as Madelyn. My only problem is getting enough newspaper because the print edition is not very thick now that they have digital editions for subscribers. My other bunnies have wood shavings in their litter boxes. Some types of shavings are not recommended for bunnies, others are not very absorbent or are expensive.