My neighbor had a crazy cat. That cat shredded EVERYTHING. Couch, curtains, wall, kids, parents... it was insane. They loved the cat, but couldn't live with it scratching everything. They had it declawed. The cat still tried to be an ass, but instead there was fluffy little sweet paws swiping at my legs and at their possessions, including their kids. Best thing that could happen to the cat to preserve its life in their home. The cat never showed signs of pain or anything. He just kept on living his life to the end.