So I have this huge gelding (huge by my standards -- about 16hh), 2-Pak, and I've always wanted to show him at halter, because he's just so pretty. Originally I couldn't because of his trailering issues, but now that that has been solved, I realized that he doesn't know how to/won't trot at hand!
I tried getting him to the same way that I trained Bandit and Dante -- just sorta take off running and keep the pressure on his halter until he breaks into a trot, then adjust my pace -- but he's so long legged, he just speeds up his walk and refuses to pick up the pace! By the time he decides he's had enough of the pressure on his halter, I'm practically out of breath!
I tried having someone run behind him and yell, but he doesn't mind them at all.