Hi. I have a small ledge in the hallway on the second floor of my house that drops down to the first floor. The ledge is over four feet off the ground and I've seen my new 7 month old kitty looking up at it a few times. If he jumps up there and overshoots, there's nothing to stop him from falling. The ledge is only seven inches wide. He's very active and jumping on everything, including my fireplace mantle which is over five feet high. Does anyone know of some sort of product or netting I can put in this area to protect him? I'm so worried about this!