When there were 3 bucks about 70-80 yards away from me and walking away at the same time, I gave a couple grunts and it did nothing, I waited a couple minutes, gave a doe bleat, but not too loud..and I heard one kinda grunt and all 3 of their heads popped up. (they were eating in a bean field) I got the same reaction out of them every time that I did this..they never did get spooked from it, they were just wondering where the hell she was..