A dog's menstrual period (estrus) usually lasts about 2 to 3 weeks, but the specific duration will vary based on individual differences. To determine whether your dog's menstrual period is over, you can pay attention to the following points:
1. Bleeding stops: At the beginning of the menstrual period, dogs will have vaginal bleeding. As the menstrual period draws to a close, blood flow gradually decreases and eventually stops. When you observe that your dog is no longer having significant blood discharge, this may mean that the menstrual period is over.
2. Vaginal color changes: At the beginning of the menstrual period, the dog’s vaginal discharge is usually red. Over time, the discharge may gradually become lighter in color and eventually become clear or colorless. When you notice a noticeable change in the color of your vaginal discharge, which tends to be colorless or clear, this may be a sign that your period is coming to an end.
3. The dog’s behavior returns to normal: During the menstrual period, the dog’s behavior may undergo some changes, such as excitement, anxiety, attraction to male dogs, etc. As the menstrual period ends, the dog's behavior will gradually return to normal and no longer show obvious estrus behavior.
Please note that the above is just some general guidance and may not apply to all dogs. If you have any questions or concerns about your dog's period, it is recommended to consult your veterinarian who can give more specific and personalized advice.
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