Cats biting may be caused by teeth changes, estrus, boredom, etc. The owner can prepare teething sticks and toys to divert the cat’s attention. If the cat is in estrus, consider whether to let the cat mate. If not, it is recommended to take the cat as soon as possible. Go to a pet hospital for sterilization surgery to relieve the cat's pain. In addition, cats will bite when they are bored. The owner should stop the cat in time to avoid developing bad habits.