Chad Kieffer, a third-generation farmer from Utica, Minnesota, has five milkers for his herd of 350 cows. The milkers are squat, patient, persistent workers. They hum around the mooing cows. They are ...

A farmer is sitting by a cow, milking by hand. The year is 1944, the year I was born. He’s milking the same way his father and grandfather did before him. Nothing much had changed in milking cows over ...