AP Business Writer Tyson Foods Inc. plans to revise labels that say its fresh chicken is "raised without antibiotics" after the U.S. Department of Agriculture said it made a mistake in approving labels that use that term. The world's largest meat processor said it has been in discussions with the USDA since at least September about the label it introduced this summer in a major marketing campaign for its fresh chicken. According to a Nov. 6 letter from the USDA, the agency told Tyson it had mistakenly overlooked a feed additive, called ionophores, used for Tyson's chicken when it approved...