Thank you for this great mini-lesson, Admin! I did my degree work in anthropology/prehistoric civilizations, and can't think of a single prehistoric site in the world where humans were not living with their long-time companions.
I recall reading somewhere during my coursework when I was in college back in the Stone Age (LOL!) that some units of the ancient Roman army used to keep kennels of both Rotties AND Maltese (!!!) on hand. The fuzzy, innocuous little Malties were released first to sniff out enemy positions; the enemy usually did not react to these way-too-cute little dogs, and sometimes played with them, so the Malties usually got well behind enemy lines. The Rotties, on the other hand, were trained to track the Malties, and in this way led their handlers straight to hidden enemy positions. Talk about sneaky...
But most of the time dogs have been companions... partners in work and play... and what companions they are!