In response to the F.D.A's tentative approval of food from cloned animals, George Siemon, CEO of Organic Valley, the nation's oldest and largest organic farmers cooperative, called on the USDA to clarify its position on the use of cloned animals. Siemon assumed that cloning would be prohibited in the national organic standard as it falls within the ban on GMOs, excluded methods and prohibited technologies. Explained Siemon, "Organic farmers work in harmony with nature, not to change it. Consumers can be assured that Organic Valley and its meat brand, Organic Prairie, will never allow the use of cloned animals on our farms and in our products."