Muzzle training day 1:
I started off by introducing him to the muzzle and he got a click for any interaction with it (looks, a move in its direction, etc.). When he grew more confident I went on to only clicking when he targeted the muzzle with his paws and nose. I faded the clicks to only nose targeting and gave him jackpots whenever he’d push his snout inside the muzzle. At the end of the training session he understood that when I give the muzzle a slight shake he has to push his snout in for a reward.