Training of bulls, bears, horses, and other animals, for the purpose of baiting them with dogs, was certainly practiced by the jugglers; and this vicious pastime has the sanction of high antiquity. Fitz-Stephen, who lived in the reign of Henry II, tells us that, in the forenoon of every holiday, during the winter season, the young Londoners were amused with boars opposed to each other in battle, or with bulls and full-grown bears baited by dogs. This author makes no mention of horses; and I believe the baiting of these noble and useful animals was never a general practice: it was, however, no doubt, partially performed…Asses also were treated with the same inhumanity; but probably the poor beasts did not afford sufficient sport in the tormenting, and therefore were seldom brought forward as the objects of this barbarous diversion.
Joseph Strutt