For some reason, I always believed that the females had no real choice as to which stallion she might belong to. This summer taught me that this may not be always the case. In this image the stallions are battling it out as the mares quietly watch.
Note also that the gold stallion is missing his left ear. It was ripped off in a very bloody fight almost two years ago as he came of fighting age, and took on more than he could handle. He won two mares and lost them in just two days, going away with some significant injuries, one less ear and very damaged confidence. It took that long for him to come back.