I have a question about hidey houses. I make my own out of cardboard boxes (Fed Ex, pizza, etc). I like them because they have flat tops, unlike pigloos, and my guys like to play 'king of the mountain'. The problem is, I have to make a new box every few weeks because they eat away at it. Eventually, they make themselves a big hole in the roof, or cut down a support beam and when they jump on top it buckles. I don't mind making new boxes, but I'm wondering, should I be careful about the amount of cardboard they eat? They're rediculous chewers. I tried to attach fleece to the top of the box once to see if they'd like the bedding... I had to take it out a few hours later. They were eating it like it was an exotic veggie.