In 1200 AD Northern Short-tailed sheep were continuing to develop into distinct breeds in isolated locations and people on Shetland may have been selecting for soft, fine wool from early on in this period, although during the eighteenth century crossbreeding and changes in husbandry motivated by meat production had a negative impact on the breed. The Shetland Flock Book Society was formed in 1926, among it’s objects being to retain the traditional quality of the wool and to maintain a hardy, healthy, robust stock and in 1985 the Shetland Sheep Breeders Group was formed to help breeders outside the Shetland Islands to maintain flocks conforming to the 1927 Breed Standard. The group then became responsible for registering Shetland Sheep on the mainland. The SSBG was initially a breeders group within the Rare Breeds Survival Trust, but since 1991 it has become a fully independent body. In October 2002 the SSBG changed its name to the Shetland Sheep Society.