When buying eggs to feed your infants and young children, it is critical to consider the health benefits and advantages of "pasture-raised eggs" (the GOLD standard) over "free-roaming" or "organic" eggs - and certainly over conventional (aka battery hens) grocery store eggs.
Yes, it is ABSOLUTELY worth it for you to find a source of great quality pastured eggs and to spend more money per dozen on these fantastic power-packed nutrient dense foods! Why?
Here are some great articles which summarize the research and provide resources on where to find a farm in your area or one who can ship them to you.
How to Buy Organic Eggs: Pastured vs. Free Range Eggs
Mother Earth News: Eggs from hens raised on pasture are more nutritious than factory farms
Lexicon of Sustainability - The difference between "Pastured" eggs vs "Free-Range"
FL: Cowart Ranch Florida Ranch with Pasture-raised chickens
Miller's Organic Farm in Bird-in-Hand, PA: Pasture-raised animals (fed NO soy)
Miami, FL's My Healthy Food Club
MyHealthyFoodClub.com sources pastured eggs from Miller's Organic Farm