MILK occupies a special place in our lives and language. It has been dubbed “nature’s most perfect food,” and we speak sentimentally of the “land of milk and honey” and the “milk of human kindness.” But things are turning sour for consumers of milk. The average price of a gallon of milk nationwide is up 37 cents since January, to $3.47. Strong demand and limited ability to increase production quickly are expected to increase prices more, and experts have speculated that the price per gallon could reach a record $5 by year’s end. High feed costs associated with the ramping...