Most cage-free chickens have their beaks cut off to avoid pecking each other to death. Since marketers took hold of the phrase "cage-free" and "free-range," they've painted pastoral pictures on egg cartons and led us to believe that cage-free actually means freedom to roam outdoors.
Here's the truth:
Grist put together an informative video about this issue and the struggle to regain control over our language. It's worth a watch!