I received the just-released book Gallop to Freedom by the Cavalia stars Magali Delgado & Frederic Pignon. Here are some wonderful quotes:
What people do not appreciate is that every time a horse submits to pressure, whether subtle or overt, he is diminished. Probably the great maajority of people who achieve their own ends by making their horse submit are not even aware of what they have done. It is a sad fact that a horse can be made to do many things by breasking his will. If he can be persuaded to give his assent freely and pleasurably rather than give into man’s pressure or clever techniques, he is not diminished.
The Horses at Alderlore Present 