I bought 7 barred rock chicks and 5 Rhode Islands to eventually add to my established flock of 7 hens and a Rhode Island Red roo. I kept the babies isolated in the garage in a double ex-large dog crate until they became 70 % feathered. I then built a new coop to accommodate everyone. Since they began feathering, three of the babies attack my hand when I reach in for their feed and waterers. I flip them away and they return with a vengeance!. Two days ago I put their cage and my established flock into the new coop at night. the next morning I was in there before dawn to see how their reactions were. Those three that attack my hand were relentlessly trying to peck anyone thru their cage....when they try to attack my adult roo, "Ace" accepts the challenge and we have a pecking war thru the cage. I assume they are baby roos by their behavior and the slight development of combs. Will they try to kill each other if I open the cage door? They are out growing their cage and I need to let them out. I have no caged yard as everyone is free range. Any suggestions?