Ducky let's them free range in her mansion.What do you people house rabbits in? For indoor pets, I like Living World cages. Easy to clean, sturdy, and compact. Though Willow currently lives in a small kiddie pool she can jump in and out of as well. It works well because the aging guinea pig that shares it can't jump out, but it lets her come and go at will. They're good friends, and I find it far more space efficient to have them share housing, as basement space is limited.