* Variable Heat Cycle Length: Each dog's heat cycle (estrus) varies in length. It can range from about 14 to 21 days.
* Ovulation Timing: Dogs don't ovulate immediately when bleeding starts. Ovulation typically occurs around the middle of their heat cycle, roughly 10-14 days after bleeding begins.
* Individual Dog Variation: Even within a breed, there can be significant differences in the length of the heat cycle and the timing of ovulation.
To determine the optimal breeding window:
1. Consult your veterinarian: Your vet can perform a vaginal cytology test to monitor the changes in the cells of your dog's vaginal discharge, indicating ovulation.
2. Use a progesterone test: This test measures the levels of progesterone, a hormone that rises significantly during ovulation.
3. Observe for behavioral changes: Dogs typically become more receptive to mating around the time of ovulation.
Remember: Breeding should be carefully planned and only undertaken with the advice and supervision of a veterinarian.