I give my dog small sheds and horns from small bucks I kill on meat hunts to chew on. I let her keep them in the house so they are always laying around. I try to give her fresh ones as often as I can. Then when we go out to hunt for sheds she knows she gets to keep them and use them as a chew toy. I keep the good big one and let her keep the small ones. I will also hide them around the house and outside in the yard and make her use her nose to find them. That's what works for me. She has found quite a few. I also take her deer hinting with me as well when I'm in a meat hunt and she finds some half burried too. I think have the horns for her to chew on keeps the scent strong in her nose.