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Published online 7 August 2003 | Nature | doi:10.1038/news030804-7
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Free-range chickens need trees
Farmed fowl pine for ancestral forest.
What made the free-range chicken cross the road? Trees, say British researchers who are trying to coax timid poultry into the farmyard.
In the European Union, chickens and their eggs are labeled as free-range if the birds enjoy access to the outdoors for at least eight hours a day.
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