My boys love it under the couch too. We have the wall lined with cardboard and frequently flip the couch to make sure they aren't pulling the fabric off the bottom. Luckily the legs are metal, so they can't chew them. There's always a stash of sticks under the couch, they "steal" them from the box during playtime and hide them under there. They also hide hay and pellets under the couch too, sometime I think they would rather live under there than in their cages. I always sit on the floor while they're out to play, and usually have the flashlight ready too. lol