Douglas Goff, PhD, Professor of Food Science at the University of Guelph, stated on his "Dairy Science and Technology Education Series" website (accessed on July 5, 2018):

“Many centuries ago, perhaps as early as 6000-8000 BC, ancient man learned to domesticate species of animals for the provision of milk to be consumed by them. These included cows (genus Bos), buffaloes, sheep, goats, and camels, all of which are still used in various parts of the world for the production of milk for human consumption.”

July 5, 2018