Developed by Diane Schivera, Organic Livestock Specialist, Maine Organic Farmers and Gardeners Association. Reviewed and updated by Jacki Martinez Perkins, Organic Dairy and Livestock Specialist, Maine Organic Farmers and Gardeners Association (2025). For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our publications and books at extension.umaine.edu/publications/. Health-care principles for organic farms