Help! My Cat is Scratching All of My Furniture! (Vet Answered)
This question has been answered by a vet

Veterinarian & Animal Behaviorist
With nearly two decades in veterinary medicine, Dr. Paola brings hands-on experience across multiple species. A graduate of the University of Guadalajara, she specializes in preventive care, animal welfare, and positive reinforcement training.
The Question
“My cat has a habit of scratching at the carpet and furniture, even though I’ve provided him with scratching posts. Is he marking his territory, or does he just think my couch looks more fun than his scratching post?” – Boots’ Dad, Levi
Quick Info about Boots

Hey Levi, you are not alone, cats are territorial and love to mark everything as theirs.
You have done the right thing by providing a scratching post but now you will need to make your furniture undesirable too: aluminum foil, stick tape, and deterrent sprays are some options to try. Since you mention Boots also scratches the carpet, you will need to provide a horizontal scratching surface as well, the same thing you will need to make it undesirable for him by trying a few tricks. We really like the Hepper Hi Lo Scratcher because it provides 3 heights and orientations for scratching, changed with ease, depending on the mood a cat is in.
Another clue point here is that Boots might have learned that by scratching certain stuff instead of others he gets attention, so these remote correction tricks should do their magic. The other part of the equation is to make the designated scratching areas more desirable: if Boots likes catnip, you can sprinkle some in there, and you should also be reinforcing Boots with a treat, cuddles, or the opportunity to play with a favorite toy every time he chooses the right places to scratch. It will take time, consistency, and repetition, but it is definitely possible.
