What methods do you use? I want to establish a cue for drop it/leave it. So far I've done toy exchanges for slippers she likes to run off with and I say "drop it" and reward by exchange with the alternative toy or a treat and praise.
However, this doesn't always work for things she shouldn't get eg rubbish or potentially poisonous flowers on walks etc so I've had to resort to distraction with "what's this?" and a treat to get her away from it. I don't necessarily want her to become too reliant on a treat to drop/leave though as I've noticed the crafty pup deliberately taking things she shouldn't while looking at me in order to get a treat!!!