If you've never seen a fawn with buttons so small as to be almost undetectable then you either havent seen many button bucks or your deer are far different than the long haired critters we have. I have noticed it is much easier to tell on early season deer here and on southern deer, but some of them are quite difficult once they get thier long winter coat. Belive me, I have probably killed more deer with a bow than many of you are years old, this in a state with very limited tags, my attention to detail is quite good.