Dohner, JV. 2001. Sable Island, pages 371-374 in The Encyclopedia of Historic and Endangered Livestock and Poultry Breeds. Yale University Press, New Haven and London.
Note (ZL): The author—Janet Vorwald Dohner—presents information on the history, characteristics, qualities, and traits of 138 endangered livestock breeds (goats, sheep, swine, cattle, horses, and other equids) and 53 poultry breeds (chickens, turkeys, ducks, geese). Each breed description indicates whether it is recognized by the American Livestock Breeds Conservancy, Rare Breeds Canada, or the Rare Breeds Survival Trust (the British organization), as well as its status: at risk, endangered, critical. The Sable Island horses are listed by Rare Breeds Canada as “critical”. [514 pages, with 160 colour plates, and 80 black-&-white illustrations]