Heat Cycle For Dogs. For reasons that yet need to be understood there seems to be a tendency for kenneled dogs to influence each others heat cycles. They start to bleed and then by day 12 it goes pink and by day 16 they stop bleeding. Eggs develop in follicles on the ovaries and produce estrogen. After their first heat cycle dogs come into heat an average of twice a year or about every 6 months.
However this interval can vary between breeds and from dog to dog. A puppy can go into heat sooner than you. On average most dogs will have their first heat cycle between six and 15 months of age. The Bitchs Heat Cycle A normal heat cycle lasts approximately three weeks within which the bitch will go through different stages. Her vulva will swell and you may notice a blood-tinged discharge 1 but many dogs are fastidious about messes and will clean themselves before you notice. A dog heat cycle only happens once or twice a year.
This is the fourth and last phase of the heat cycle.
The four stages of the dog heat cycle proestrus estrus diestrus and anestrus all work together to allow your female dog a chance to become a mother to puppy litters. Stage 1 of the Dog Heat Cycle. The dog heat cycle is the hallmark of a female dogs reproductive capabilities. Female dogs tend to go in heat anywhere between every 6 and 12 months depending on breeds. The first stage of the dog heat cycle is called proestrus. The age of a dogs first heat cycle varies greatly between breeds.