Dairy cattle are often treated with recombinant bovine growth hormone (rBGH) to increase milk production. Hormones are banned for use in poultry in the U.S. (but that doesn’t stop chicken producers from marketing their birds as hormone-free!).Antibiotics are also routinely administered to animals raised for food.he best way to ensure your meat is free of drugs, hormones, and antibiotic-resistant bacteria is to buy organic meat varieties, which by law cannot come from treated animals. Local farms with pastured animals may also be a safer meat source.