Look closely at egg cartons in the supermarket, and you'll find many marketing claims—from organic to natural, and everything in between. Two of the most common labels, “cage-free” and “free-range,” ...

From “cage-free,” to “free-range” and “pasture-raised,” the labels on egg cartons can be confusing. Add in labels like “certified humane” or “certified organic,” and suddenly picking the right egg can ...