Kevin likes to think of his cows as athletes. And this means feeding them like athletes too. He says that "the better the diet they have, the more diverse their feed intake. It [a grass-based diet] gets a lot of the proper minerals from the soil into the cow and then into the milk." So not only does grazing translate to a herd of strapping, healthy cows, it also means delicious and nutritious milk. Kevin shares that scientists studying the effects of managed grass-based agriculture identify a distribution of fat on grazing cows that is visible in the hair patterns on their coats. And the name for this pattern? Happy lines.