Dairy Farmers of Ontario (DFO) is the marketing group for the largest sector of Ontario agriculture and is proudly owned and operated by Ontario's dairy farm families. DFO is a non-profit organization, representing approximately 3,500 Ontario dairy farms. Established in 1965 as the Ontario Milk Marketing Board, we continue to be a dynamic organization, remaining committed to our mission: “To provide leadership and excellence in the production and marketing of Canadian milk.”