On average, a female dog that hasn't been neutered or spayed goes into heat twice a year. The duration of the heat cycle is between 12 and 21 days, although this varies between breeds and individual dogs and can last up to four weeks.
A dog usually experiences its first heat cycle between the ages of 6 and 12 months and can become pregnant at this point. The heat, or canine estrus, cycle has four stages; proestrus, estrus, metestrus and anestrus. Male dogs are attracted to the female during the proestrus stage, but the female isn't receptive until the estrus stage, when bleeding occurs.Learn More
Although the heat cycle varies from breed to breed and in individual dogs, the average time a female dog is attractive to male dogs (or in heat) is 18 days. Most females are attracted to males for less time than that.Full Answer >
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.Full Answer >
The female dog does not have a period but a heat, or estrus, cycle. During the proestrus stage of the heat cycle, the female dog bleeds, and male dogs become attracted to her.Full Answer >
Female beagle dogs typically go into heat at 6 months old. Some beagles go into heat as early as 4 months old, while others wait until they are 12 to 15 months old.Full Answer >