I've never stalked closer than 70 yrds, and that was almost an accident as I was walking out for lunch and saw the deer coming and eased up to get a better shot with an old black powder rifle. I have, however, been on the ground and had a doe sniff me from INCHES. When I was about 15 I made a ground blind in a tangle of wild grape vine, kind of cleared out the middle so it looked kind of like a giant bird nest, about waist high. I had already used my doe tag for the year and she came up and actually put her head over the edge of the blind to get a good sniff. The thing is she never did spook. Just stared for a while, then made her way on by. I have wondered if she had been tamed at some point or been in a rescue, or maybe was on the short branch of that genetic tree.