My wife had a metal try on the refrigerator to help keep the cats out of the cabinet. It didn’t work. They would just push it to the side and open the cabinet door anyway. One day, one of our boys pushed that tray off the fridge and dented the wood floor. That’s when I decided to not put the tray back. I instead put up a makeshift lock using a spatula. Rose then put a rug up there and voilà, instant cat perch.