I have 9 BR's, about 3.5 weeks old. I think 2 are roos. And the small roo is being aggressive. They all peck at each other occasionally, but HE is just mean. Goes after their eyes & tops of heads mostly. I separated him, but 3.5 wks seems young to have this problem. ?? He was sad/depressed while alone, and didn't eat yesterday while alone. So I was putting him in w/ the others only while supervised and he would eat/drink. I think he's eating now in his bachelor pad....but not sure, he's not happy with me, and goes after my hand at times. Any ideas? I hope for them to go in the coop this weekend. Their quarters aren't that cramped though, they have the recommended space. Once I took him out, the girls were HARMONIOUS again. The big roo seems like a sweetheart (in comparison).