Now that I am looking into incubating eggs, I'm making a sound decision to be specific on the breed I'd like to work with. My "Dixie Rainbows" are large brown egg layers nearly daily & seem to be fairly well tempered, which I love. But I am wondering where Dixie Rainbows came from? Any specific breed match? Do all chickens cross breed? I have "A" Buff Orphington roo. He is with BO's, Dixie Rainbows, Light/Dark Brahma's & Barred Rocks. If they cross breed ... what can I expect in return with tempers, egg production, colors, etc.?