I have 4 Rhode Island Red hens and one rooster, whose breed I don't know. They are 6 months old, so we just started getting eggs. Our main priorities for our flock is to have docile (especially with kids) hens that lay through an intense, Massachusetts winter. The coop is about 4 by 10, with a run for them about 3 by 8. I plan on Barred Rocks or Wyandottes, but I heard Wyandottes can be flighty and a little aggressive. I know I want to get Barred Rocks, but how many should I get?