See the difference between cage-free egg production and battery-cage egg production.
McDonald's switching to cage-free chickens for its Egg McMuffins
Free-range eggs - Wikipedia
What the Fast-Food Industry's Shift to Cage-Free Eggs Really Means
Utah hen farms will be going cage-free, so you'll be paying more
The Cage-Free Illusion: A Critical Examination of Egg Production
Cage-Free - Certified Humane
A new law requires all eggs sold in Washington to be cage-free
Petition · STOP THE SUFFERING OF HENS & COMMIT TO CAGE
cage-free Archives - Page 2 of 2 - Humane Society International