Island Farms - A dairy cooperative offering information on products, ingredients, storage and shelf life. Foremost Farms - Cheese and milk marketing dairy cooperatives. Lakeland Dairies Co-operative Society Limited - Irish based cooperative producing milk products. Prairie Farms - Cooperative primarily in the business of processing fluid milk. Swiss Valley Farms - A farmer-owned cooperative with dairy farmers/owners located in Wisconsin, Iowa, Illinois, and Minnesota. Wisconsin Sheep Dairy Cooperative - Sheep Milk and Sheep Milk Cheese produced by small family farms. Includes a list of coop farms, news, and membership information. Upstate Farms Cooperative, Inc. - Markets a wide variety of products including milk, dip, ice cream mix, yogurt, and flavored milk-based beverages.