get a dog
as a puppy play with it using a shed antler play fetch and stuff
when it gets older tell it to sit and stay go set the antler on the ground about 30 yards away walk back and say something like get the antler or find
then when it gets a little older tell it to stay walk around the house or somthing and hide the antler say find or whatever you said before (early on dont hide the antler too well just around the corner or something) keep doing this until you cant keep the dog from finding the antler then your ready to go try it out
in the woods

i have not done this but ive seen my buddies dog find sheds and its amazing

i just do it the old fashioned way blind luck