Article Photos: Burger King makes cage-free eggs, pork promise 1/1

FILE - In this Aug. 24, 2010 file photo, patrons enjoy a meal at a Burger King in Springfield, Ill.  The movement by U.S. food corporations toward more humane treatment of animals experienced a whopper of a shift Wednesday, April 25, 2012,  when Burger King announced that all of its eggs and pork will come from cage-free chickens and pigs by 2017. The decision by the world's second-biggest fast-food restaurant raises the bar for other companies seeking to appeal to the rising consumer demand for more humanely produced fare.(AP Photo/Seth Perlman)