I have 1 barred rock, 3 buff rocks, and 3 black austerlorps. in the last week or so I have noticed one of the austerlorps acting a little mean or something. If I reach into the coop to touch another chicken or to get one out it comes at me. If I pick her up she's just fine. Tonight I had one of my buff rocks out, and when I went to put her back the austerlorp in question pecked her pretty hard a couple times. Before anyone says it NO she is not a rooster. they are all just at 5 months old right now. What is going on with this black austerlorp?