I don't cage my cats, but when Jack was really young when he was really sick he couldn't make it to the litter box so I bought one of those really tall 3 level cat cages to contain his poop. I still have it and all it has in it is cat beds and toys and a small cat scratcher and a small litter box. All the cats love it in there. I leave the door open 24/7 and they prefer to be in there to play and sleep. Is that weird? They have toys and scratchers and a large litter box and whatnot in the house but they really love the cage. The other two have never expirienced it with the door shut. Are they crazy? Do cats like "dens" like dogs do?