jersey cow Island farmers had always kept a few cows. But as well as the Jersey breed, some farmers were farming French cows. In 1786 the States of Jersey passed a new law, whereby any farmer who brought French cattle into Jersey would be fined 200 livres (about £3) for each animal. This law was later extended and finally an act of 1878 declared that no bovine animals could be imported into the island. This law has ensured the purity of the Jersey breed ever since.