Tyson Foods has settled a $5M class-action suit over its two-year promotional campaign that claimed its chickens were “raised without antibiotics,” according to LawyersAndSettlements.com.

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Representing consumers who purchased Tyson chicken products during the period of the promotional campaign, the suit alleged that Tyson’s treatment of chickens with ionophores constituted antibiotic use. Tyson has stated that ionophores are better classed as antimicrobials because they are not used as antibiotics in human medicine, but the U.S. Department of Agriculture classifies them as antibiotics.