Animal husbandry in the British Agricultural Revolution of the 18th century, when livestock breeds like the Dishley Longhorn cattle and Lincoln Longwool sheep were rapidly improved by agriculturalists such as Robert Bakewell to yield more meat, milk, and wool. A wide range of other species such as horse, water buffalo, llama, rabbit and guinea pig are used as livestock in some parts of the world. Insect farming, as well as aquaculture of fish, molluscs, and crustaceans, is widespread. Modern animal husbandry relies on production systems adapted to the type of land available. Subsistence farming is being superseded by intensive animal farming in
Shetland animal breeds have been exported to North America, but are not yet recognised by the American Poultry Association. The Shetland duck is a small, hardy breed of domestic duck originating in the islands. It is similar to Pomeranian duck or Swedish Blue duck. It is black with a white bib. Shetland drakes have sky blue bills and Shetland duck females have slate blue bills. The average weight of the Shetland duck is 2 kg for males and 1,8 kg for females. It is critically endangered. Shetland animal breeds The Shetland Islands of Scotland have long had their own distinct animal breeds, due