we moved in across the street from my aunt and she has an outside/inside cat and he comes over to our hosue sometimes and we let him in the house. sometimes he starts scratching on the sofa and stuff and my mom goes crazy on him!!! the thing is.... my friends cat just had kittens and we were gonna get one of them until this happened. so my question is... how do you get them to stop it and use the scratching post??? i know you can buy some of that scent stuff and spray on there to keep them away but does it work?? and does it have a scent that humans can smell?? is there anything else you could do to keep them from doing this besides the spray?? help!!