Cracking the egg code

It used to be, an egg was an egg. Now they can be cage free and free range, vegetarian and omega-3 fortified, organic, “certified humane” or “American humane certified.” The incredible, edible egg is becoming unintelligible.

For the New York Times dining section, I attempted to figure out how to interpret the labels on egg cartons. Unfortunately, researching this piece only made me more confused.