Small amounts of pesticides may pass from chickens to eggs, and from there, on to the many foods prepared with them. Organic eggs come from birds that eat organic feed and are not pumped up with growth hormone or dosed with antibiotics.
But it's not the lack of contaminants that make organic eggs a must; it's how the eggs are produced. The philosophy here is that happy chickens lay better eggs. Proponents of organic eggs say the source makes all the difference. Top-of-the-line organic eggs come from free-range chickens that have access to a yard not treated with chemicals. As stated earlier, the definition of free-range in the U.S. Department of Agriculture regulations is open to broad interpretation, so investigate the source of your eggs if humane treatment is a factor in your purchasing.
White eggs or brown? While many people think brown eggs are more nutritious, there's no difference. The color of egg depends on the breed of chicken. White chickens lay white eggs; brown chickens lay brown. It's that simple. You don't have to limit your organic egg purchases to chicken eggs. Some organic farmers now offer a variety of exotic choices -- goose, quail, even ostrich eggs.