Cats do a lot of things that seem strange to us.
For example, they bite their claws. We tell you why cats do this and when it is a cause for concern.
Cats simply sharpen their claws this way, it is a normal phenomenon.
Sometimes cats do not gnaw, but pull their claws with their teeth - they knead the ligaments and muscles. This is also within the normal range.
If you train your pet to use a scratching post, it will bite its claws less often.
You should be concerned if your cat chews its claws non-stop. This may indicate a lack of vitamins or a fungal disease, and you should contact a veterinarian.