Burger King, the world's second largest fast food chain, signaled bold change this week when it announced it will source 100 percent of its eggs and pork from cage-free chickens and crate-free pigs by 2017. The company, which purchases hundreds of millions of eggs and millions of pounds of pork annually, currently sources just nine percent of eggs and 20 percent of pork from cage-free vendors. Burger King joins a number of other brands making cage-free egg purchasing decisions, but according to Matthew Prescott, a spokesperson for the Humane Society of the United States, this is the first time a major chain has made a commitment of this caliber.

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