Anxiety caused by the mother cat barking at the kitten or the owner getting too close to the kitten. When the owner approaches the kitten for a period of time after the mother cat gives birth, even touching the kitten will make the mother cat very anxious. If you are overly anxious, it may hurt your baby.
Mother cat barks at the kitten or wants to train the kitten to survive. Most cats live independently. Mother cat thinks that kittens should have the ability to survive independently when they reach a certain age, so they will get tired of their dependence on her, be fierce to kittens, keep barking, and even keep kittens away from her. This is the expression that the mother cat wants the kitten to learn to live independently.