Your horse is perfectly justified in coming off the bit if all you do is give the aid for a transition. To do transitions on the bit, you need to give two sets of aids at once: the transition aid and the aid to tell him to stay on the bit — the connecting aids. When you give these two sets of aids at once, you’re telling your horse to do a transition on the bit.
Essentially, you’ll superimpose the connecting aids over the aids for a transition. That is, you’ll give the connecting aids before, during, and after the transition.
In this case, the connecting aids last several seconds. Apply them lightly before, during, and after the transition so that you “bridge” the transition with your connecting aids.
Continue reading Keep Your Horse on the Bit during Transitions, by Jane Savoie