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In this Oct. 21, 2015, file photo, cage-free chickens walk in a fenced pasture at an organic farm near Waukon, Iowa. Some farmers are wondering if it's OK that eggs sold as free-range come from chickens being kept inside. It's a question that arises lately as farmers try to be open about their product while also protecting chickens from a highly infectious bird flu that has killed roughly 28 million poultry across the country.

Avian Flu outbreaks in Illinois

The 21st Show