Last year, I dropped a 400 pound cow elk. Out of the herd of 15 head, not one of them moved except the one I dropped. These weren't all one year olds either. Then another kid got up and shot a rock, one ran, but nothing. Then his cousin got up and shot off seven shots before hitting an elk. It took over ten minutes for them to clear out.
This was on state land. If an animal has not had face time with humans, they usually aren't timid of them especially if they are far away.
Hell, I've walked through a herd of elk in the day time, as they watched and smelled me walk through the herd.