About five years ago, I though I had discovered the secret. Western Illinois whitetails seemed to run to me using grunt tubes or fawn bleats and rattles, which meant easy sucess with traditional archery tackle. Since then I have moved (unfortunately) to within one hour of Chicago. Now I hunt more populated public hunting areas which recieve heavy hunting pressure. The deer have figured it out, I have seen deer "sneaking" away after hearing a grunt or bleat. In my experience lately, a fawn bleat must be the equvalent in deer speak as yelling, run for your life this guy is a carnivore!!!!