At some point after a female dog comes into heat, there is a bloody vaginal discharge. The amount of bleeding differs from dog to dog. In some cases it is not even noticeable to the dog owner.
A female dog's estrus cycle is the period during which she is able to become pregnant. These generally occur every six months, although there is some variation among breeds and individual dogs. Smaller dogs generally have less time between cycles, while big dogs have more. During each cycle, a dog is in heat for two to three weeks. In addition to discharge, another physical sign of estrus is swelling of the vulva, although this, too, is not always apparent to owners.Learn More
When a female dog is in heat, an intact and sexually mature male dog in the area can act anxious and aggressive towards other male dogs. He loses interest in anything except mating. A neutered male dog usually acts normally around a female dog in heat.Full Answer >
A female dog goes into heat again between 4 and 6 months of having her puppies. The non-spayed dog goes into heat twice a year, and this is known as estrus.Full Answer >
When dogs mate, the bulbus glandis of the male dog's penis swells inside the female dog's vagina, and this is a normal part of dog breeding. The act of the dogs getting stuck together is called a tie. The sperm is released during the beginning of the tie and prostatic fluid is released afterwards.Full Answer >
The gestation period for dogs is about 63 days. This time frame is measured from the day of ovulation to the day that the dog gives birth. As with humans, the gestation period is divided into three trimesters.Full Answer >