What causes a horse to anticipate flying changes and how do you prevent it?

Anticipation of flying changes — the horse offering a change without being asked, or tensing and preparing for a change at specific locations in the arena where changes have previously been requested — is one of the most common and most problematic training issues associated with flying change development, because it undermines the responsiveness and obedience that high-quality changes require and creates a horse that is managing its own training rather than responding to the rider's aids. Anticipation typically develops when changes are trained at the same locations repeatedly — always on the diagonal from the same letter, always at the same track location — teaching the horse to anticipate the request based on its position in the arena rather than waiting for the rider's aids. The prevention requires systematic variety in where and when changes are requested: training changes from counter-canter on a circle, from the long side, from unexpected locations in the arena, and interspersing counter-canter exercises where no change is asked alongside exercises where a change is asked prevents the horse from predicting when a change will be requested. Practicing maintaining counter-canter through locations where the horse anticipates a change — riding through the diagonal or the corner where changes are typically asked while actively preventing any change — directly addresses the anticipation by teaching the horse that the rider's aids, not the arena location, determine when a change occurs. If anticipation has already developed, a period of working exclusively in counter-canter without changes — sometimes for several weeks — can reset the horse's expectation and restore the genuine waiting for the rider's aid that correct changes require. The rider's own consistency in using the aids rather than relying on location or setup to trigger the change also significantly reduces anticipation.