My younger EE were put by me into the coup two days ago. They were about a third smaller than my 22 week old leghorns and buffs. They were not getting along but no major issues for two days just the normal pecking order getting worked out. Then this morning my wife went to go check on them and one of the four had almost no tail feathers and was bleeding. I have cleaned her up and separated them back up. Put rooster booster on them 3 of the 4 had sore spots. I am glad my wife caught it early this morning. I just don't know why after two days of living and sleeping together they were attacked buy my buff? And she is not even laying yet.