I have a bun now for 8 months or so now. He has been outside with free run. It's been perfect but now things have changed. He will have run of the back yard during the day and will have to be in a cage at night. I'm going to by him the 42 inch dog cage and build a shelf in it. Other than his food what do you put in there? Do people have a area with wood pellets for pooping with hay in it and keep the rest of the cage floor bare> with maybe a towel and paper? Toys I know. But what really is the happiest set up for single bunnies in their cages?