What are the symptoms of a dog coming to his aunt?

In the early stage of a dog coming to his aunt, the vulva will be swollen, secretions will begin to increase, and mucus mixed with oil and blood will flow; ||The dog will begin to accept mating during the aunt period, which lasts for 6-14 days. The vulva continues to be swollen and soft, the mucus flowing out becomes lighter, and the bleeding reduces or stops;||The vulva will eliminate the swelling and gradually return to normal, and the female dog's personality will become quiet.