According to animal behaviorists, the reason is amazingly enough NOT that they are just sharpening their claws. Research on cat behavior suggests that the major reason for this behavior is communication. By roughing up the bark of a tree, or the leg of your favorite chair, the cat is letting other cats or people (which they see as a form of different, food-bearing cat anyway) know where she is and what she is up to. Cats will therefore scratch by preference something easily scratchable and they usually limit themselves to a few 'favorite' scratching spots they will keep revisiting.
Cats scratch mirrors to mark their territory, stretch their muscles, and maintain their claws.
Cats scratch windows to mark their territory, stretch their muscles, and sharpen their claws.
Cats scratch on mirrors to mark their territory, stretch their muscles, and maintain their claws. Mirrors may also provide a reflective surface that intrigues cats, leading them to scratch.
Cats may scratch on glass surfaces out of curiosity, to mark their territory, or to sharpen their claws.
Cats scratch on windows to mark their territory, stretch their muscles, and communicate their needs or desires.
they are smart balls of fluff that do love everyone. they won't scratch AT YOU in till you make them really mad. <3 ;)
Cats scratch as a natural behavior to mark their territory and keep their claws healthy. They don't scratch to intentionally hurt you, but it can be painful if they scratch you accidentally. Cats may not feel bad about scratching you, as it is instinctual for them.
dogs + cats = scratch scratch scratch
Cats scratch blankets to mark their territory, stretch their muscles, and keep their claws healthy and sharp.
Cats scratch glass surfaces to mark their territory, stretch their muscles, and sharpen their claws.
Cats scratch their face to mark their territory, stretch their muscles, and keep their claws healthy and sharp.
all cats do