How the mustangs learn to lead
"Once you've trained a horse with positive reinforcement, he'll never do anything for you unless you have a treat in your pocket". That's one of the most common prejudices about positive reinforcement training out there.
Fortunately, it isn't true. Almost all the Mustang Camp horses end up going to homes where treats are not used in daily handling procedures, so they have to learn to be handled quietly and safely with pressure and release and in the absence of food rewards. To teach them this, Patricia Barlow-Irick uses food rewards.