Seasonally: Mares are seasonal breeders, meaning they only come into heat during certain times of the year. This is usually in the spring and summer months, when the days are longer and there's more daylight.
Age: Young mares often have irregular cycles, but usually reach their first estrus cycle around 12-18 months of age. Mature mares typically cycle for a longer period.
Breed: Some breeds, like Thoroughbreds, are known to have longer breeding seasons than others.
Environmental Factors: The amount of daylight and temperature can affect a mare's cycle.
Within the Cycle: A mare's heat cycle typically lasts about 5-7 days. During this time, she will show signs of being in heat, such as:
* Restlessness: She may pace, paw the ground, and be more vocal.
* Vulval Swelling: Her vulva will become swollen and red.
* Mucus Discharge: A clear, watery mucus will discharge from her vulva.
* Stallions: She will show a strong attraction to stallions and will stand for mounting.
It's important to note: It's impossible to predict the exact timing of a mare's heat cycle. It's best to consult with a veterinarian to determine the best time for breeding or for managing your mare's cycle.