Dogs do not have a menstrual period like humans. Instead, they go through an estrous cycle, commonly known as being "in heat." The bleeding phase in female dogs, called proestrus, typically lasts about 7 to 10 days. The entire heat cycle usually spans about 2 to 4 weeks, during which the dog may bleed and show other signs of being in heat. More specifically:
- The proestrus stage, when bleeding starts and the vulva swells, lasts around 7 to 10 days.
- The full heat cycle (estrus) lasts approximately 2 to 4 weeks.
- Dogs can experience this heat cycle about twice a year, roughly every 6 months, though this can vary by breed, size, and individual dog.
In summary, the "period" or bleeding in dogs lasts about 7 to 10 days as part of their heat cycle, which itself is around 2 to 4 weeks long.
