My mini-lop bunny, Quaffle , is allergic to Aspen, and other types of wood based litter. I recently went to Yesterday's News, which is a recycled paper pellet litter, and that works well for her.
Bunnies are pretty smart , mine is like a small dog, she's never chewed anything, or peed outside of her box. I don't know if I just got lucky, or what. But she's my cute little ball of fluff.