Over several years of stalking I have often been frustrated by some species of deer, Roe and Muntjac, that tend to keep moving whilst eating, making an effective shot very impossible.
One very experienced stalker told me that they will respond to a whistle. I have tried this several times and sure enough it stops them, up comes the head and they stop for just enough time!!
I even tried this on a buck who was startled by me missing first time, he stopped a few yards away. Muntjac will stop in their tracks and look toward the source of the sound.
Anyone else do this?