The OP asked about bias. I have a bias against white chickens based solely on the fact that they get dirty and anyone looking at them know that they are dirty! With that said, I have accidently gotten two white chickens and love them both. As for the white egg bias, there is a lot more to that. Years ago, depression era and before, people raised chickens to provide their eggs and meat because they couldn't afford to buy them in stores. Most of these chickens layed brown eggs. Once a family earned enough to be able to buy eggs, they associated the white colored eggs available in the store with their newly aquired wealth. Affluent people never ate brown eggs and associated the brown eggs with a lower class of citizen. Anyone raised eating white eggs from the grocery store could see the brown eggs as less clean. These biases are alive and well today. The resurgance of the brown eggs popularity is due to the healthy eating trend and again, the white eggs are associated with the stores and the brown eggs are associated with "home grown" and "organic." We all know that there is no difference in the store bought white and brown eggs, and no difference in pasture raised white and brown eggs, but there are strong biases all over the place for many reasons. I always ask someone how they feel about home raised eggs before I offer to give them eggs. I don't mind if they don't want them (for whatever reason) but don't want them to go to people who don't relish them like we do. You would be surprised at the number of people who will not eat them, or who will but can't fully enjoy them. I am the same way about yellow or purple tomatoes..........