For my liter box I've always had to use the wire topped kind but they are so small. I want to have a cat litter box for my woolly jersey bunny (not with cat litter!). But she had problems cleaning her bum and poop would get caught in her long fur so i had to use the wire topped kind. Any suggestions? Hope yall can help! Btw my first bun and i am totally in love with her! Ive never had a pet with such a great personality!