https://www.americangrassfed.org/
American Grassfed Association (AGA) is a national organization that provides certification, market support, education, research, and advocacy on behalf of grassfed ruminants and dairy and pastured pork producers and supporters. AGA offers independent family farms and ranches use of the first and USA only grassfed certification program developed by grassfed ranchers, scientists, veterinarians, and other industry experts.