Sometimes when a doe has you pegged, but cannot determine if you are truly a threat, she will pretend to feed, then snap her head up to try to detect motion. Other times they will stomp, snort and come to you, usually at an angle to try to get a "different veiw". Bucks will ocaisionally do the same thing, though not as often. Does are more concerned with their young, even if they've already been weaned. Bucks, only worry about themselves.

Most times, they convince themselves that its better safe than sorry, regardless of whether the detect scent or movement - and will retreat. Occaisionally, they will give the "alls safe" signal (a sideways flip of the tail) and resume their activity. Even then they will check back a few times while passing.