During the Renaissance, horses—long considered the privileged, even sentient companions of knights-errant—gradually lost their special place on the field of battle and, with it, their distinctive status in the world of chivalric heroism. Parrots, once the miraculous, articulate companions of popes and emperors, declined into figures of mindless mimicry. Cats, which were tortured by Catholics in the Middle Ages, were tortured in the Reformation as part of the Protestant attack...