I currently have a small flock of ten mixed hens only, I've gotten 9 new chicks. 5 brown Leghorns 2 Barred Rocks 2 Red Rocks all are from 7 to 5 weeks old They were raised by same supplier but not together as a group. First problem Brown Leghorns are being so aggressive I've had to separate Red Rocks and Barred rocks out! How can I raise chicks as a "group" or is this possible. (brown Leghorns are drawing blood on Barred Rocks and Red Rocks! ) Next how do I immagrate them into existing flock so they have less stress if possible and won't be harassed excessively? Also at what age (temps here are still cool at night here) do I introduce them outside with current flock.