OK. This is kind of long, so bear with me. This past Sunday afternoon and evening I bow hunted a 3 acre clover food plot that has held deer all year.Since the beginning of October, I have hunted this plot. This is private property with bowhunting only. I have watched anywhere from 15 to 25 yearlings, does and young bucks enter this food plot within 30 minutes of the same time each time I have sat in the stand, always from the same corner of the plot. I am a scent free fanatic, cover scent, etc. Always keeping the wind in my favor. The stand has only been hunted frequently. The way the standsite is entered, is where you are not exposed to the plot, and upwind of the plot. I have always heard that when a cold front is coming through to get out there and hunt. That happened this past Sunday. I sat from 12:30 till dark'30. Nothing entered the foodplot. No yearlings or anything. Could they somehow have picked up enough of my scent entering to the stand, from past entries, so that they found another place to feed. Or could the older bucks have dispersed them? Or maybe they possibly changed to another food source? I have been observing and hunting them since early October.