In three weeks we are finally moving to our 20 acres (east of Norman, OK). I've been researching chickens and know that I want hens that lay extra large eggs and are good producers. I'm leaning towards the isa brown's. Pros? Cons? How do they do in the OK heat? The OK winter? Do you recommend a different breed of great egg layers for Oklahoma? Help! I'm a newbie Coop will be built in the first week at our new place and I want to get chickens as soon as its done! Also, where in OK can I purchase chickens that are 3-4months?! THANKS!!