Female Teddy dogs go into estrus twice a year. They will enter estrus from March to May and September to November each year. Each time they last for 10-15 days, they can mate at this stage. During the two estrus periods, there will be 6 breaks. There is no fixed time for a male Teddy dog ​​to be in estrus, and it will come into estrus along with the female dog's estrus. Teddy will take the initiative to approach the opposite sex when in heat. If the owner does not want the dog to reproduce, he must take measures to stay away from the opposite sex.