I have two cats, Cosmo and Curby. They're pretty well behaved; they usually use their two scratching posts. However, on occassion they will get lazy and use the rug/mat in the kitchen. I want to get wall to wall carpeting in the living room, but am concerned they will see it as one big scratching area and not use their designated scratching posts. Is it possible to condition my cats to only use their scratching posts, and not the carpeting?