Not surprisingly, major retail chains score very low in this analysis.
Even if it costs more to produce your own eggs, it might be well worth it.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
Willie Smits: Village Based Permaculture Approaches in Indonesia (video)