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Why cats scratch
Short answerScratching is normal, innate cat behavior. According to Cornell's Feline Health Center, it's largely a marking behavior: cats deposit scent from glands in their paws and leave visible marks in their territory. Scratching also removes the worn outer sheath from claws and gives muscles a healthy stretch. Your cat isn't destroying the sofa out of revenge - they're doing something their instincts require, on a surface that happens to work well for it.
Sources: Cornell Feline Health Center and the AVMA, linked on our sources page.
Three jobs scratching does
Scent and visual markingPaw glands leave scent behind, and the scratch marks themselves are a visible territorial signal. Cats often scratch prominent, central spots - which is why the sofa arm, not the hidden corner, gets it.
Claw maintenanceScratching strips the translucent outer sheath from the claw, keeping the nail underneath healthy and functional.
StretchingA full vertical scratch stretches the back, shoulders and toes. Cats often do it right after waking up.
Why "just stop it" doesn't work
Because the behavior is innate, it can't be trained away - only redirected. Cornell's behavior guidance is clear that punishment backfires: cats don't connect the punishment with the act, they connect it with you, and many simply learn to scratch when you're not in the room. Yelling, water sprays and startling teach fear, not furniture manners.
The working approach
The plan that actually succeeds has three parts: give your cat scratching surfaces they prefer (posts matched to their taste), teach them to use those spots with rewards (training to the post), and make the furniture less appealing while the new habit forms (humane protection). The scratch map helps you see where in your home the behavior concentrates, so you can place posts where they'll be used.
Questions about your cat's scratching?PawLine gives research-based answers tailored to your cat's breed, age, history and the situations you're seeing at home.Ask PawLine 
