When I go shed hunting I find most of them on north faceing slopes, at the base of them.It might be different in your neck of the woods? I just hike around all day looking for them.I go in March.
I have a yellow lab for ducks,but he hasn't been shed hunting. I'm thinkin he might do good because when I bring sheds home he gos nuts and wants to chew them all the time. Good luck