How do you stop a reining horse from anticipating the lead change?

A reining horse that anticipates the lead change — drifting toward the center, building pace, or beginning the change before the rider asks — has learned to associate a specific location, speed, or sequence of events with the change cue and is executing the maneuver based on that association rather than waiting for the rider's specific aid. The correction requires disrupting every element of that learned association so the horse must wait for the actual cue rather than the predictors that have come to substitute for it. The most effective approach is to vary the schooling routine in every way that can be varied: lope through the center of the arena without changing leads and continue on the same circle, counter-canter for an additional full circle before asking for the change, transition down to a trot or collected lope at the center rather than changing, or circle away from the center without any change at all. The horse that encounters the center and sometimes changes, sometimes continues, sometimes counter-canters, and sometimes transitions learns that the center itself means nothing — only the rider's cue means change. The timing of the change should also be varied: sometimes ask early in the approach to the center, sometimes late, sometimes exactly at the midpoint, so the horse cannot narrow the anticipation to a specific moment within the approach. Counter-cantering specifically through the location where changes normally happen is one of the most direct corrections for anticipation, because it requires the horse to maintain the wrong lead through the trigger location, which directly contradicts the expected pattern. Horses confirmed in counter-canter both directions will almost always show less anticipation in their lead changes because they have learned that direction of travel does not automatically determine lead, which is the foundational understanding that prevents anticipation from developing.