How to motivate your horse? What role can rewards play? Can we do without it once the exercise has been learned? What should I do if my horse is invasive when working with carrots? Are the caress and the voice rewards? So many questions raised by work using “positive reinforcement”, so called by ethologists. The author, herself with a scientific background, presents a little-known approach to the equestrian environment. “Clicker training” is above all a state of mind rather than a technique. It places the learning mechanisms and knowledge of the animal at the heart of the system. Drawing on numerous scientific references, Hélène Roche indicates a promising path to enrich the relationship between horses and humans.