Any deer hunters here?

I hunt the family farm. 100 ac. 5 mins from my house. I'm also the caretaker of the Farm. So I know pretty much what comes and goes.Have taken three deer so far this season. 2 week shotgun season here after Thanksgiving. I'm sure I'll take more. Had a big buck in my crossbow sight last night at about 25 yds. He was walking rather fast so I whistled at him. He bolted before I could get off a shot. I've used this technique often to stop walking deer. Sometimes I grunt, sometimes I whistle . Guess I should have grunted this time. DOH... I did shoot this 9 pointer last month during a short Muzzle Loader season. His was only around 140 lbs. Still pretty big for my area. Oh yeah... were eatin him now.