During Taylor’s Western Pleasure class with Nightmare, just behind the barn row, Aarya was preparing a different kind of competitor. Aimee, the prettiest grullo mare in Taylor’s herd - at least, according to Aarya - stood tethered quietly beneath the shade of a canvas awning. Her soft mouse-gray coat shimmered with hints of silver and steel, her dark points accenting her expressive, doe-like eyes and black-tipped ears. A long, old scar ran down the length of her right hind leg, a relic of...