All of the gpigs are removed from the cage several times a week and put in a make-shift play pen for excercise. The outer fence is a Small Pet Playpen from MidWest Homes for Pets. We use three of these to make a large pen (with a few panels left over, seen in the middle of the cage). This cage is ideal because the smaller more colorful fences seen in the picture did not stop two of our gpigs from jumping them and escaping to run wild in the house. Each time the playpen is set up, a different configuration or room location is used, and different props are added. Each playpen is carefully inspected by the cats before they are moved to a bedroom.