All of my hens lay some variety of brown. Two of my hens are white - no clue what they are, but they lay brown eggs. So I looked up layers just out of curiosity and now I am curious. Why is the white hen and white egg what everyone knows as a "chicken" when white/white seems kinda rare. And what breed is that, that most egg factories use? I thought my whites were leghorns but I got brown eggs. Any guesses?