This article from Smithsonian magazine is about the migration of humans and their dogs 9,000 years ago.
"Europe’s First Dogs Disappeared After Neolithic Farmers Arrived With Their Own Pups. Genetic analysis shows ancient canines from the Near East slowly replaced indigenous dog populations of that period."
The Neolithic is characterized by fixed human settlements and the invention of agriculture from circa 10,000 BC.
Click here to read the article: smithsonianmag.com/first-farmers-brought-their-doggos-with-them-europe