Do a radial search from where you found it and then if no luck, try and get in his mind and pic a trail or 2 to hit. Could be hidden in a bush or something when he bent down to feed. Use optics if you can. They help when the sun is right. Pray he didn't carry it for a week before losing it. I am lucky where I go because they are normally in the same places every year. I call them bone yards. If I find one, I usually walk a circle and find 5 or 6 within a 60 yd circle. One week all I found were left sides (23) next week went back out and found 24 and most were right sides. I have yet to go this year and fear the weeds and grass are getting too tall. But, I know where to look, so it should be good for finding a dozen maybe. I got a 7 point Whitetail, but I did not measure it yet. I did measure the 5 pointer because it was impressive. Good luck on that hunt!!