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
Campolina is well developed. One symptom of poor breeding is a narrow chest with inadequate musculature between the front legs. This is a particular concern with the crossbred "Mangolina" (Mangalarga Marchador x Campolina) Visually, however, the breeding practice frequently results in animals that are heavy in the rear end and look weak and unbalanced in rostro-caudal plane when viewed for the animal’s full length. The underline of the Campolina should appear well fleshed but not overly rounded. There should be a good inverse symmetry in silhouette or side profile between the curvature of the underline and the fully outstretched neck and