The Dairy Margin Protection Program was authorized in the 2014 Farm Bill as a risk management program. It pays farmers when the difference between the price they are paid for milk produced at the farm and the cost of feed, or margin, falls below a set amount. But many dairy farmers, especially in the Northeast, said the program was expensive and didn’t work. And that is causing concern as officials try to get dairy producers to sign up for the revised program by June 1st. Vermont officials were at the Statehouse in Montpelier Tuesday to urge farmers to sign up.