Dogged

Genetic studies on the remains of dogs (from Europe, the near East and Siberia) appear to have established that, at the time of the last ice-Age (11,000 years ago), there were 5 genetically distinct types of dogs (https://www.theguardian.com/world/2020/oct/29/five-distinct-types-dog-existed-end-last-ice-age-study-finds). All 5 appear to have been evolved from a common ancestor, a domesticated wolf-type animal. Comparisons with the genes of modern dog varieties, also suggest that all European breeds (like German shepherds) are 50:50 crosses of a form from the Levant and one from Northern Europe. Who do they think they are?