Sometimes your gut tells you the right thing, mine always does. However, having just had my experience with a maiden mare for the first time, she did NOT show at all to the stallion, in fact if i was a little more nervous, i would have not gotten her covered cause i would have been SURE she was not in season at any point. Once she covered though, she became a real hussy and she did not even need a halter to cover, she just ran and stuck her arse out hahaha.