I noticed that two of my birds were pecking at the other one around her earlobe (She didn't seem to mind). She has some blood feathers around her neck, so I thought that maybe one of them had burst. However, when I picked her up, she was perfectly fine with no sores or broken feathers. Does this sound like feather picking? If not, what would they be doing? I didn't think that birds groomed each other, and it doesn't seem to be agressive?