Labrador generally starts its first heat at 6-8 months of age, which means it is sexually mature, but the first heat is not recommended for breeding, because at this time the Labrador is not physically mature, so the body can not bear the load of reproduction, it is best to wait until it is more than a year old, that is, after the second heat before breeding. Generally speaking, Labradors come into seasonal heat twice a year as adults, mostly in the spring and fall. The male and female dogs show different symptoms. Generally, the female dog will show obvious redness and swelling of the vulva, and will start ovulating 2-3 days after the heat, and the vulva will secrete pink fluid, which is also known as menstruation. The purpose is to leave his own scent.
