I'm getting close to finishing up my chicken tractor (a modified Garden Ark) for our urban backyard flock-to-be. I've only got room for 3 (for now), and I'm trying to decide if I should get all one breed, or if I can mix it up and they'll still get along. The points I am considering are: 1. My 6-year-old is excited to help. I want hens that are docile, friendly, and easy to handle. She loves the idea of getting a silkie. 2. One egg/day between the three is probably sufficient for our needs, but we have friends and neighbors who'd be happy to take our extras. Bonus if the eggs are colored. 3. Preferably the birds can't or won't be inclined to fly over a 4' fence so we can let them free range some without worrying about the birds escaping into neighboring yards. 4. We want a hardy breed for our cold winters and hot summers. If I can manage to get them all as chicks at the same time, do you think an Orpington or Australorp + an Easter Egger + a Silkie would all get along?