Dairy cows have formed many cultures of the world. But what do we really know about dairy farmers and the dairy market? Is it appropriate that milk is that cheap in Europe? Does dairy production need subsidies? Is small-scale farming more cow-friendly than factory farming? The author explains social, economic, sanitary and ethic problems of dairy farming, how "butter mountains" in Europe arose and vanished, how New Zealand abolished subsidies and became the biggest dairy exporter and why dairy cows do not spoil the climate.