Hi I am doing research in hopes of purchasing my first tiny flock of chickens this spring. I'm looking for something about med sized that lays well is hearty (east tennessee has some frosty winters) and pretty friendly as I have a 3 year old and would love to share this experience with her. I do prefer the idea of cross breeds any suggestions would be wonderful! breeds that go well together in a flock? breeds that shouldnt mix generally? or very aggressive breeds?