What do the prices of cheese and butter in Chicago have to do with how much you pay for milk at the local supermarket? Just about everything. And the result is that you're paying more for a gallon of milk than ever before. In part, the big increases can be blamed on popular high-protein, low-carb diets. And yet, milk still costs less than water. "It's all working like it should, but, unfortunately, next year we're going to have too much milk." How the price of milk reached a record-high | 
