Pottok the Losino, the Galician, the Landais, and the Monchino horses. Tests have revealed considerable genetic differences between populations in the Northern Basque Country and the Southern Basque Country, leading some to consider them separate breeds. Some claim the Pottok's origins derive from the horses on ancient cave paintings in the area and thus claim to descend from the Magdalenian horses of 14,000–7000 BC. Other link its origins to an influx of horses during the Bronze Age. However, neither of these theories has to date been scientifically verified. Genetic research by the University of the Basque Country's Genetics, Physical Anthropology and
Chicken breeds recognized by the American Poultry Association Chicken breeds recognized by the American Poultry Association All chicken breeds recognized by the American Poultry Association are categorized into classes. Standard-sized breeds are grouped by type or by place of origin; bantam breeds are classified according to type or physical characteristics. The large breeds are divided into six classes – American, Asiatic, Continental, English, Mediterranean, and All Other Standard Breeds – largely according to their place of origin. The American Class contains thirteen breeds which originated in Canada or the United States. All are heavy breeds, and most lay brown eggs; most are cold-hardy: These three breeds originate in