My first real job (25 years ago... at age 15) was collecting eggs at a medium-sized commercial egg farm. Maybe I didn't care about "organic" or "cage-free" at age 15 or nobody cared 25 year ago, but we were one of those "battery cage" farms. It was long buildings with 5 rows of double stacked cages. The floor of the cage was slanted so that the eggs rolled out into a trough in the front. We'd push a narrow cart down the row and collect the eggs into trays. It was brutal for both humans and chickens. I didn't eat eggs or chicken for awhile after that.