For the past two years, at an undisclosed location in the Upper Midwest, a large commercial egg farm has been probed with every tool of modern science. Researchers have collected data on feed consumed ...

The typical life of an egg-laying chicken is beginning to change dramatically. Ninety percent of the eggs we eat come from chickens that live in long lines of wire cages, about eight birds to a cage.

Chickens stand in an enriched, or colony, cage system that gives them a darkened area for nesting at the JS West farm in 2011 in Atwater, Calif. For the past two years, at an undisclosed location in ...