What I do is I trot to the first barrel, then when I get a few feet away, I walk. This creates a "pocket". I do it with all three barrels. But when we're geting ready to go "home" I walk him. I don't think horses need practice running in a straight line. And when the horse do get the pattern, don't do it every day. The get too sour. Sour is when the refuse too do the pattern and if you go to a competition, the might refuse to go into the arena or they start rearing and bucking so they don't have to do the pattern
Forget The Knight In Shining Armor, Take His Horse Instead!