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
Hip replacement (animal) performed in the medium-large breeds of dogs. An animal suffering from hip dysplasia may have been in some degree of chronic pain all its life from a very young age but mat show no overt sign of pain. Rather, they have adapted to the pain over an extended period, and learned to live with it. As a result in many animals, successful hip replacement is gives animals a level of playfulness and happiness not previously seen. As with all surgeries, results vary, and there is both risk and uncertainty involved. Animal hip replacements are usually made from the same material