Eggs may be a staple, but they're not basic anymore. The variety of specialty eggs on the market can be baffling. So can the claims: less fat, more vitamins, more humane treatment of chickens. These select (and costly) yolks make up 5% of eggs consumed in the U.S. but are a growing business. They all tend to taste the same, so what are the differences? --By Sora Song

ALL-NATURAL Hens are fed a diet free of additives, fillers and antibiotics. Look for the U.S.D.A. shield for assurance that this claim and others like it are valid.

FREE RANGE Hens are raised...

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