i use the tarsal galnds of bucks I kill. Use them in different area than wherre you killed the buck and another dominant buck will think A deer has moved in to take away his girlfriends. Becareful useing these when wallking in and out of the woods at dark. I have had rut crazed bucks stalk me I would hate to be on the end of a charge w/ those nice sharp antlers. And dont keep the tarsal glands more than 1 1/2 years or they loose the "correct" smell.