You do not stop a cat from scratching, you move it. Put a scratcher right next to the spot on the couch, match the angle your cat likes, and make the couch less appealing while the habit shifts.
Why do cats scratch furniture?
Scratching is normal cat behavior, not bad manners. Cats scratch to stretch their backs and shoulders, to keep their claws in shape and to mark territory, both with visible marks and with scent from glands in their paws. That is why they choose spots that are prominent and easy to grip: the arm of the couch, the corner by the door, the side of the bed. A cat that scratches the couch is telling you it is a good place to leave a message. The fix is to offer a better place nearby.
Where should I put a scratcher?
Right where the damage is happening. If your cat scratches the left arm of the couch, the scratcher goes against the left arm of the couch, not in a spare room. Cats also like to scratch after waking up, so a scratcher near where they sleep gets used. Once your cat is using the new scratcher reliably, you can move it a little at a time, a few inches every few days, to a spot that suits you better.
Which type of scratcher works best?
Watch how your cat scratches now. A cat that reaches up the side of the couch prefers to scratch upright, so choose a tall post or a corner scratcher that it can stretch fully along. A cat that scratches the rug or the bottom of the couch prefers horizontal surfaces, so a flat or angled cardboard scratcher suits it. Texture matters too: many cats like sisal, others prefer cardboard. If you are not sure, try one of each and see which one gets used. A scratcher should be steady: a post that wobbles or tips is one a cat will avoid.
How do I make the couch less tempting?
While the new habit forms, make the old spot less satisfying. Cover the scratched area with a throw or a fitted cover, or apply double-sided furniture tape, which most cats dislike under their paws. Remove the cover only after your cat has been using the scratcher for a few weeks. Never punish your cat for scratching: it does not understand why and may just scratch when you are out of the room.
How do I teach my cat to use the scratcher?
Make the scratcher the most interesting thing in the room. Drag a wand toy across it so your cat's claws catch it. Rub a little catnip or silvervine on it if your cat responds to them. Praise or treat your cat as soon as it scratches the right place. Keep the scratcher in place even when it looks worn: shredded fibers and cardboard mean it is working, and cats prefer a scratcher that already smells like them.
How many scratchers do I need?
More than one usually helps, especially in a home with several cats. A good start is one scratcher near each spot your cat scratches now, plus one near where it sleeps. Mix types if you can: an upright post by the couch, a flat cardboard pad by the bed. In a small apartment, a corner scratcher or a wall-mounted piece saves floor space while still sitting right where it is needed.
Should I trim my cat's claws?
Regular trims reduce damage while your cat learns, and many cats accept them with patience and treats. If you are unsure how to trim safely, ask your vet to show you. Trimming does not replace scratching, so keep the scratchers out either way.