For about the past year I've wanted to start raising chickens in our back yard. I like chickens, I love eggs, and I am making an effort to eat less processed / hormone infused / made in a factory food. I'm looking to purchase 4 pullets - two white egg laying and two brown egg laying. Here's what I'm looking for: 1. Best egg producers 2. Best immunity / disease resistant 3. Best at getting along with other chickens What breeds would y'all recommend I purchase?