At Echo Farm, Inc. in Hinsdale, sisters Beth and Courtney Hodge can be found milking their 70 cows at a first-generation dairy operation that started out years ago as a 4H project. The sisters sell most of their milk to the Agri-Mark Cooperative, a Vermont-based operation best known for Cabot Creamery products. For 23 years they’ve kept some of their milk on hand to make Echo Farm Puddings, artisan desserts sold in farm stands and Hannaford supermarkets throughout New Hampshire.