In the early stages, the female golden retriever may have a swollen and moist vulva with a small amount of pink mucus. After 7-10 days, the female golden retriever will show obvious signs of estrus, a bad temper, congestion in the vulva, and a gradual increase in secretions, and The color deepens to blood color. It will not be until 11 days later that the vulva will begin to reduce swelling, secretions will decrease, and the temper will become much more restrained.