At Trewithen Dairy, based in the Glyn Valley between Lostwithiel and Bodmin, their farmers and their cows are the difference. Every drop of milk that is produced comes from local herds all from within 25 miles of the dairy. This ensures that the focus is on delivering the best milk and dairy products possible, through a simple equation that says: the happier and healthier the cows, the better the milk they produce.