When a female dog reaches 6-8 months old, she will have her first visit, which means that the dog is close to maturity. Then she will have her second visit in half a year, and then basically once every six months, then twice a year. Second-rate. When the dog comes to aunt, the owner can put on menstrual pants for the dog. At this time, if you don't want the dog to be a mother, you must stay away from the male dog.