When I got my cage, the door opened from the top down and I found “hippety” getting caught in the door as it lay open at an angle to the floor. I re-attached the door from the side, and then from the office supply store, I got a couple of plastic “binding spines” that they use to hold reports together. (Not the spiral ones). They are very cheap and come in all colors. These protect him from the wire edges of the cage opening and help define the door area. Just clip to size and put over the wire sides.