Perdue will study the effects of features such as perches in chicken houses. It hopes to double the activity levels of its chickens in the next three years. Business Wire hide caption

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Business Wire

In Quest For Happier Chickens, Perdue Shifts How Birds Live And Die

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Ioanna Mattke holds Raven, one of six hens that her family owns. The Mattkes have raised Raven since she was a day old. Jason Beaubien/NPR hide caption

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Jason Beaubien/NPR

Chicken Owners Brood Over CDC Advice Not To Kiss, Cuddle Birds

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A gate blocks the entrance of a farm operated by Daybreak Foods, on May 17, 2015 near Eagle Grove, Iowa. The facility was reportedly struck by the current outbreak of bird flu. Secretary of Agriculture Tom Vilsick says biosecurity measures are crucial to containing the spread of the disease, which has only infected birds, not humans. Scott Olson/Getty Images hide caption

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Scott Olson/Getty Images

Secretary Of Agriculture: Bird Flu Poses 'No Health Issue' To Humans

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These "enriched cages" from the JS West farm in Atwater, Calif., in 2011 comply with the state's new law. They are larger and allow chickens to perch and lay eggs in enclosed spaces. Jill Benson/AP hide caption

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Jill Benson/AP

How California's New Rules Are Scrambling The Egg Industry

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Free-range chickens stand in a pen at an organic-accredited poultry farm in Germany. Joern Pollex/Getty Images hide caption

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Joern Pollex/Getty Images

Chicken Confidential: How This Bird Came To Rule The Cultural Roost

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To refrigerate or not to refrigerate? It boils down to bacteria, aesthetics and how much energy you're willing to use. Robert S. Donovan; Flickr / Alex Barth; Flickr hide caption

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Robert S. Donovan; Flickr / Alex Barth; Flickr

Sheep graze in the street last year in Cairo. Gianluigi Guercia/AFP/Getty Images hide caption

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Gianluigi Guercia/AFP/Getty Images

Clucking all the way to the bank: A hen models a polka-dot diaper from MyPetChicken.com, a multimillion-dollar business that sells everything from chicken caviar treats to day-old birds. Courtesy of MyPetChicken.com hide caption

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Courtesy of MyPetChicken.com