I have a 14 year old that is injuring himself on the wire door of the cat carrier. His poor little nose ends up bloody and so does the inside of his mouth. I bought a carrier that has the front and top doors for loading but both doors are coated metal doors. Has anyone else run into this problem? I really can't afford to buy another carrier. I was thinking that maybe I could place something, on the inside, of the door. But I could use some helpful hints here.