The temperament of male dogs in sub-estrus will change, their desire to attack other male dogs will increase, and they will also urinate randomly and enclose territory. If there is a female dog nearby and the male dog will lie on his crotch, the male dog may have a loss of appetite during the period of estrus.

When the male dog is in estrus, if the male dog has reached adulthood, the owner can consider breeding. However, if the male dog is still underage, due to the underdevelopment of the reproductive system, the sperm survival rate is not high, so it is not recommended to breed at this time. If there is no idea of ​​breeding, the owner can perform castration surgery before the male dog goes into estrus or after the male dog goes into estrus.