Young pigs stare out of a pen at a hog farm in North Dakota. In coming months, consumers will start to see a new label on some packages of pork: Produced "without the use of ractopamine." Will Kincaid/AP hide caption

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Will Kincaid/AP

A Muscle Drug For Pigs Comes Out Of The Shadows

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Author Barry Estabrook says pigs can be taught to play computer games and recognize themselves in a mirror. W. W. Norton & Company hide caption

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W. W. Norton & Company

'Tales' Of Pig Intelligence, Factory Farming And Humane Bacon

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Workers prepare burritos at a Chipotle Mexican Grill in New York. The restaurant chain has stopped serving pork in about one-third of its U.S. locations. Richard Levine/Demotix/Corbis hide caption

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Richard Levine/Demotix/Corbis

Chipotle's Pulled Pork Highlights Debate Over Sow Welfare

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Michael Yezzi raises 1,000 pigs a year in Shushan, N.Y. He's worried about how to keep his farm safe from a disease that has no proven cure. Abbie Fentress Swanson for NPR hide caption

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Abbie Fentress Swanson for NPR

As Pig Virus Spreads, The Price Of Pork Continues To Rise

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France has banned imports of live pigs and other products from the U.S. to keep out a virus that has killed more than 4 million pigs in the U.S. Here, young pigs look out of a pen at a North Dakota hog farm in a 2005 file photo. Will Kincaid/AP hide caption

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Will Kincaid/AP

Piglets at Hilldale Farm in State Center, Iowa in March 2013, just before porcine epidemic diarrhea began spreading through hog farms in the U.S. Amy Mayer/Harvest Public Media hide caption

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Amy Mayer/Harvest Public Media

In recent years, pork producers have found ways to keep the animals healthy through improved hygiene. M. Spencer Green/AP hide caption

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M. Spencer Green/AP

Why Are Pig Farmers Still Using Growth-Promoting Drugs?

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William von Schneidau, who owns the BB Ranch butcher shop at Pike Place Market in Seattle, has made prosciutto from pigs fed marijuana. Courtesy of BB Ranch hide caption

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Courtesy of BB Ranch

Berkshire pigs on Happy Hula Farm, a member of the Eden Farms collective. Amy Mayer/Iowa Public Radio hide caption

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Amy Mayer/Iowa Public Radio

Villagers gather dead pigs in Jiaxing, in eastern China's Zhejiang province, on Wednesday. The number of dead pigs found in Shanghai's main river had doubled in two days to more than 6,000, the government said. AFP/AFP/Getty Images hide caption

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AFP/AFP/Getty Images

Shanghai's Dead Pigs: Search For Answers Turns Up Denials

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A Russian sow on Mark Baker's farm. Four other parties have joined Baker's lawsuit against the Michigan Department of Natural Resources. Courtesy of Long Haul Productions hide caption

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Courtesy of Long Haul Productions

Battle Over Michigan's New Swine Rules Goes Hog Wild

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