I've noticed my favorite, docile, Cinnamon Queen has started pecking at my feet when I feed everyone. She used to let me pick her up and would do the "submission" dance before I picked her up. Now she runs and she sometimes aggressively comes after me. She is 10 months old. The only change would be that I introduced a new chicken to the group a few months back. They all seemed to acclimate well (after an adjustment period) but she still pecks at the new chicken and chases her around. Any thoughts about why she's doing this would be appreciated. Could she just be upset at me for bringing a new one in?