Scratching is not bad behavior, it is a basic cat instinct, which is exactly why yelling at a cat for scratching the couch rarely works.
It Is Not About Sharpening Claws Alone
Scratching also stretches a cat's back and shoulder muscles and leaves behind a scent marker from glands in their paws, which is a form of territory marking they cannot simply stop doing.
Give Them a Better Option
The most reliable way to protect furniture is to offer a scratching surface that is more appealing than the couch, placed somewhere your cat already likes to be.
Corrugated Cardboard Works Surprisingly Well
Many cats prefer the texture of corrugated cardboard over carpet or sisal, and a scratcher shaped like a cozy sofa or lounge doubles as a resting spot too.
Add a Little Incentive
A scratcher with an attached teaser ball encourages first contact, and once a cat starts using it regularly, the habit tends to stick.
