Transboundary breed Transboundary breed A transboundary breed is a breed which is present in several countries. Transboundary species of the five significant livestock types (cattle, sheep, goats, pigs and chickens), have been developed for a hundred years or more in intensive manufacturing systems, which has led to global availability. A relatively small number of worldwide transboundary breeds compose the ever-increasing share of total global animal products. However, only in North America and the Southwest Pacific do the number of transboundary breeds surpass that of local breeds. There can be both regional and international types of transboundary breeds. Regional breeds are breeds that
Southdown sheep kohl rabi and other forage crops, the folding system took off, increasing in parallel with expanding human population. The system reached its zenith from about 1845 to 1880. The 20th century brought the establishment of pedigree recording. By 1911, 359 registered Southdown flocks contained some 114,495 breeding ewes throughout Britain. Much remained the same until the First World War, when the Southdown flocks declined with some rapidity, as shepherds and farm workers went off to war. By 1922, the 359 pedigree flocks had shrunk to 245. From then until 1939, the registered Southdown flocks numbered around 200. Folded flocks were