I'm still a new piggie owner and was wondering if it was safe to use a Kleenex box as a hidey house? (It does have a print on it, but no glue really from what I could tell) We recently expanded their cage (again) and now have room for more houses and I thought it may be a quick, cheap, solution. They love chewing on the paper towel rolls so I thought this to may be safe for them, however I just wanted to check and make sure. Thanks for any advice.