The Jersey breed of dairy cattle originated on the island of Jersey, a British Island off the coast of France. It is one of the oldest cattle breeds, and is believed to be purebred for almost 600 years. (They were commonly called Alderney cattle before the late 18th century). Since 1789 they are the only breed allowed on the island of Jersey.
Jersey's milk is high in butter fat, and they produce more milk per pound of body weight than any other breed of dairy cattle. During each lactation period they produce more than 13 times their body weight in milk. (Their average weight is 900 pounds).
One Jersey named Marlu Milady's, produced 22,236 gallons of milk in her lifetime.