Day 1: Learning to move on a lead line. Day 1: Adusting to the bosal for the first time.
Day 1: Adding a lead line to the bosal. Day 1: Learning to lunge and giving to pressure.
Training sessions have not yet exceeded 20-30 minutes. Baby steps at first to build trust and learn the basics. Ruben trains in a bosal. The bosal teaches the horse to give to pressure without pain. A bit in a horse's mouth at this point would be a distraction and not a very affective tool.