It is never right to rule a human being more harshly and cruelly than we rule dumb animals; yet a skilled horse-breaker will not scare a horse by frequent blows, because he will become timid and vicious if you do not soothe him with pats and caresses. So also a huntsman, both when he is teaching puppies to follow the tracks of wild animals, and when he uses dogs already trained to drive them from their lairs and hunt them, does not often threaten to beat them, for, if he does, he will break their spirit, and make them stupid and currish with fear; though, on the other hand, he will not allow them to roam and range about unrestrained. The same is the case with those who drive the slower draught cattle, which, though brutal treatment and wretchedness is their lot from their birth, still, by excessive cruelty may be made to refuse to draw.