I have known mares to cycle all year round. Im in Michigan, so it does get cold here.
Most mares here come into heat in March, and back out in October. But there are expections.
Id never risk putting any mare with a stallion. Mares can be successfully bred into their late 20s.
It sounds like you don't breed. Why not just geld him and make your life very stress-free and simple? Posted via Mobile Device