Shying arises from three causes defective eyesight

Shying arises from three causes defective eyesight

There is nothing that requires more patience and firmness than a shying horse. Shying arises from three causes defective eyesight, skittishness, and fear. If a horse always shies from the same side you may be sure the eye on that side is defective.

You may know that a horse shies from skittishness if he flies one day snorting from what he meets the next with indifference; dark stables also produce this irregular shying.

Fonte: Tamming Horses