When we start up our rabbit sanctuary. we could have a room like this :) Great for bunnies who don't get along so well! Wouldn't have the ones up high though, as it can be dangerous for bunnies to be too high up.
Turn a second-hand dresser into a pet bed and treat station with a few coats of paint and some Milk-Bone jars. A side table turned upside down or an oversize drawer with a large floor pillow will also double as a shabby chic dog bed when painted.