A good bull can smell, here and see you better than you can see him.
that being said if your stomping around unknown area he's got the upper hand, however, if your a good still hunter, or you are hunting during the rut he's dumb and drunk..
They aren't ghosts, but aside from using weather changes to get them to expose themselves, good still hunting skills, and possibly hunting during the rut sure changes the odds.
If the odds are against you - they are
As smart as you think the old bulls are. The young bulls are stupider.
Which is the point of this thread.
