So you want to stop your cat from scratching carpets at doorways? The CarPET Scratch Stopper can help. It fits standard U.S. doors and helps you keep your cat from damaging your carpet. When a cat tries to scratch at the carpet by a closed door, its claws will no longer be able to grip on to the carpet. The bottom surface is equipped with grippers to prevent movement. Like what you see? Sets you back $31 + s/h.