my friends staff has only been in season for 6 days and so is still bleeding, her male dog has tied with her twice in this time. why has she let him and can she get pregnant at this stage.
Here's a little bit about the anatomy and physiology of an intact female during her cycle. First is Anestrus, when there is no activity, when she is not in heat, this lasts 4-7 months.
Next stage is Proestrus. This is when the bitch (as in female intact dog) has a reddish discharge, and will attract the male, but does not mate. Proestrus can last 4 - 13 days.
The next stage is Estrus, when the discharge changes to a straw color. This is when the female is receptive to the male. Estrus can also last 4-13 days.
During estrus is when you usually want to mate a dog. To find out when your dog is in estrus, your veterinarian can do vaginal swabs and look at them under a microscope. If there is a male available, then it is common to mate them every other day. but if another male is not available and your doing artificial insemination then you should have your veterinarian test for Progesterone to see when she is ovulating. This is a long and expensive process if it's done right.
Now as for your questions. Why did she allow the dog to mate with her? Because she was in heat. You should keep all intact male dogs and intact female dogs separate when they are in heat, unless you are purposely breeding them. And, if your purposely breeding them, then there's no problems here. The bitch is not "supposed" to mate until she's ovulating, but this dog either ovulated early and you didn't notice that she's in estrus and not bleeding, or she hasn't read the books that I've read and doesn't know that she's not supposed to mate yet.
Can she get pregnant? If she's not ovulating, then the chances of her getting pregnant are decreases, but I don't believe they are totally gone.
It's best to work with your veterinarian and at least take vaginal cytologies to find out when she's in estrus, and then mate every other day as she goes through estrus. Or, if you don't want them mated, them keep her or him crated and away from each other during the entire process. Better yet, get them both spayed and neutered, which will also help their health tremendously.
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