Scratching is a natural behaviour for cats. Scratching is a territorial instinct by which cats place their mark and establish turf through scent glands in their paws. Hence, scratching the furniture at home is their idea of adding their own personal touch to the household. It can be difficult to stop your cat from scratching altogether, so instead try and have appropriate places for your cat to scratch. Scratching posts are a great idea and the more posts you have, the more appropriate places your cat has to scratch! You can spray some cat nip on the posts to encourage your cat to scratch in these areas.