These guys have out grown there cardboard hide so I had to replace it with this one. They filled it in record time. These are my 11 month old radixes. I had to take the picture fast, since they rushed the glass right after I snapped it. They are so curious about everything. Having a TV on is comical. They really do watch it. Very intently. The only thing they don't like is the lawnmower commercials. They all scream and head to the back of the hide.