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

itoggle caption Jason Beaubien/NPR

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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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

itoggle caption Jill Benson/AP

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

itoggle caption Joern Pollex/Getty Images

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

itoggle caption Robert S. Donovan; Flickr / Alex Barth; Flickr

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

itoggle caption 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

itoggle caption Courtesy of MyPetChicken.com