Fifty years ago, there were fifty family dairy farms in the town of Danby, Vermont. Today, there are four. Nationally acclaimed nature photographer David Middleton spent four years working on one of these farms, side by side with the three generations who operate it. Eldest is 93-year-old Hugh Bromley, the grandson of the first Bromley to raise dairy cows here. The property has been in the Bromley family since before the Civil War. Hugh's son, Roger,...