For most females, the best time for breeding is between the tenth and fourteenth day of estrus. However, some females ovulate as early as the third or fourth day or as late as the eighteenth day. Blood tests or vaginal cytology will assist in determining the best period for your dog.
How do I know when my dog is ready to mate?
Proestrus: Proestrus is the start of the heat period where your dog's body is preparing to mate. Signs seen during this phase include a swollen vulva, blood-tinged discharge, excessive licking of the genital area, clingy behavior, and aggression toward male dogs. Your dog may also hold her tail close to her body.
How long after bleeding is a dog fertile?
After about 9-10 days, the bleeding will become more watery, or stop. It is at this time your female will, most likely, be at her most fertile. This proestrus stage can last as long as 20 days in some dogs. So the end of bleeding can be a more useful indicator of peak fertility.
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