I agree with the others, another food source may have drawn them away if they still have plenty of cover. I did logging and land clearing for a couple years and it does draw them in. The tops of the trees are loaded with browse at certain times of the year and the educated deer know what chainsaws mean. Even the heavy equipment turfs up shoots and bulbs for them to eat. The next morning in a fresh dirt area it is loaded with deer tracks. You can see they pawing and scrapeing up wild onion bulbs and young shoots. It will not scare them away. This year the beech trees are loaded with nuts here. Could be they are in soys or alphalfa. Deer move more than most people think.