I don't have a cat who does RCO's but I do have a LOS (lazy ole stinker or another word that starts with "S") Braydee is BIG and fills up a whole step on my staircase and when he's there, HE's THERE and will not move so I can go up or down for nothin. Even if I try and brush him away with my foot - no way this big fur ball will budge an inch and he's always there when I taking a loadful of laundry downstairs or upstairs or when I have two full cat litter boxes I'm taking downstairs or upstairs He's gorgeous though - I put up with it