Daylight!
I attended a seminar at the local Bass Pro. The pro - staff guy that was giving the seminar told us it was the amount of daylight. As the daylight hours decrease it triggers the hormones which also begins to harden the antlers. He basically told us a buck is in rut at the instant he sheds his antlers. Although, there may not be any does in cycle at that time for the rut to be in full swing. Hope that helps...
I attended a seminar at the local Bass Pro. The pro - staff guy that was giving the seminar told us it was the amount of daylight. As the daylight hours decrease it triggers the hormones which also begins to harden the antlers. He basically told us a buck is in rut at the instant he sheds his antlers. Although, there may not be any does in cycle at that time for the rut to be in full swing. Hope that helps...