We've never spent much time training the one's we've used over the years, but have always managed to have a decent one. When they're young, we'd just make sure they were always exposed to killed deer. Once they are old enough to start, we'd try to always take him with us even when we knew where the deer was, make him feel like he found it. Let him gnaw on an ear or a leg or the hide when you're skinning it. Keep the hides from recent kills and play tug with him. Drag the hides around and let him chase it down. Then eventually put him up and drag the hide to a location where he can see it and let him out. Gradually drag the hide further and further away and more and more out of sight. Don't know if this is the right way or not, but it's worked and usually after 5-6 deer kills and hides to play with they'll have it figured out enough to give them a chance.
