We got a new area rug for the living room. Now the kitties go down there when they used to avoid it like the plague was down there. They like laying on the rug. Problem is, when I go down in the morning, I can tell someone's been scratching it up. There are tufts and even entire yarns pulled out. Kitties don't scratch up the other carpets, so why this one? How do I get them to stop? We have 2 scratching posts in this house for them.