FILE PHOTO: Some of the thousands of eggs produced each day by caged hens are stacked up at an egg farm in San Diego County in this picture taken July 29, 2008. REUTERS/Mike Blake/File Photo
FILE PHOTO: Some of thousands of eggs produced each day
FILE PHOTO: Some of the thousands of eggs produced each day by caged hens are stacked up at an egg farm in San Diego County in this picture taken July 29, 2008. REUTERS/Mike Blake/File Photo