I have 4 RIR pullets almost 4 weeks. We often let them frolic in the run during the warm part of the day and back in the brooder they go at night. We would like to ad one or two more. I recently heard that RIRs are more agressive and often don't play well with others. Is this what you have found in your experience? Is there a good way to introduce them? My wife likes Barred Rocks and I like the EEs. My four kids ages 3-10 love anything. We all love eggs! We are first time chicken owners. Any other suggestions for a breed good for CO that is cold hardy, has a good temperment, and is a good layer? Thanks!