Since 1910. Dairy farms. Farmer owned. Community loved. Our farmers pledge not to use artificial growth hormones (no significant difference has been shown in milk from cows treated with the artificial growth hormone rbST and non rbST treated cows). Pasteurized. Homogenized. A farmer-owned brand of Dairy Farmers of America. Mayfield Dairy Farms has been providing families with delicious, fresh dairy since 1910. Today Mayfield is 100% owned by a dairy farm cooperative that includes family farms right in your community. Bringing fresh, high-quality dairy to families like yours is our farmers' purpose and passion.