"Mr. Caligula, my Jersey Wooly, spends weeks if not over a month tearing this castle apart. He loves it -- he works on the first floor and then we cut the bottom off and he starts on the second floor until it won't stand. Then, we buy a new one. The only flaw is that the ramps to get up and down don't have any traction, so we make little "stairs" on the ramps using pieces of cardboard and tape. Sure, it's a cardboard box, but it's all set up with windows, and hey, it's really cute for pictures."