pork pork

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

The antibiotic-free pigs roam freely on Niman Ranch in Iowa. Sarah Willis/courtesy Niman Ranch hide caption

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Sarah Willis/courtesy Niman Ranch

Antibiotic-Free Meat Business Is Booming, Thanks To Chipotle

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