MIAMI — Burger King, the world’s second-largest burger chain, has pledged to do business only with cage-free egg suppliers and gestation crate-free pork suppliers by 2017. “With this announcement explicitly disapproving the extreme confinement of farm animals, Burger King has set a new standard for animal care in the food retail sector,” Wayne Pacelle, president and chief executive officer of the Humane Society of the United States, wrote on the HSUS blog after ...

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