By Dr. Thomas Cooke D.O. "Milk, it does a body good.” This was the marketing mantra employed by the cow industry in the 1980’s to boost interest in cow’s milk. The campaign was wildly successful and as a result, The Dairy Farmers of America have reported sales topping 11 billion dollars in 2007. But does the overwhelming popularity of cow’s milk in the United States signify that it really is the best?