So, I have two lovely cats, Garfield and Prism. But recently I picked up a rabbit, his names Omelette - we call him Ommy for short. Anyway, he wasn't litter trained when I got him, and so I have been encouraging him to use his litter box (shredded paper and timothy hay) but this morning when I opened his cage - as he has free roam of our room along with the cats, he peed in their litter box. I have read that clumping litter can be bad for bunnies, but he only peed and did a few poos in it. I want to know if its okay if they share? Ommy isn't eating any of it, I clean it daily, and the cats are still using it.