How do you use ground driving to teach a horse to halt and back up?

Teaching the halt and rein-back through ground driving is highly effective because the handler can see the horse's entire body during the movement and can apply rein pressure from the exact angle that produces the clearest response. The halt established through ground driving should be the same halt the horse will eventually offer under saddle — square, prompt, balanced, and relaxed — so the standard the handler accepts on the ground sets the expectation for everything that follows. To ask for the halt, the handler applies equal, simultaneous pressure on both long reins while saying whoa in a calm, drawn-out voice. The pressure should be firm but not abrupt — the horse should feel an invitation to slow and stop rather than a shock that causes him to throw his head or brace his neck. The moment the horse halts, both reins are released to complete softness. This immediate release is what teaches the horse that stopping is the correct answer and that stopping brings comfort. In the early stages, the handler should be satisfied with any stop and reward it generously, even if the halt is not perfectly square. As the horse becomes more confirmed, the standard is raised — the handler waits for a square halt before releasing, and uses slight adjustments on individual reins to encourage the horse to square up a trailing leg. This refinement work is much easier to do from the ground, where the handler can see all four legs, than from the saddle. The rein-back during ground driving is introduced by asking the horse to halt and then applying steady, alternating pressure on both reins while stepping slightly toward the horse's shoulder. The word back spoken quietly can be added as a voice cue. The handler should ask for only one or two steps backward in the beginning, releasing completely and allowing the horse to stand before asking again. Horses that step backward reluctantly or crookedly benefit from the handler repositioning slightly to encourage straightness before the next attempt. Horses that learn a prompt, square halt and a willing, straight rein-back through ground driving bring those skills directly into their ridden and driven work with very little additional training required.