This is my small flock. My Polish seems to be the aggressive one though and is the only one that has ever chased or pecked me (when I'm not putting food down ). She will also jump at me and the barred rock, I've seen her try to peck at the other's eyes too. They are 22 1/2 weeks and this behavior just started in the last 2 weeks, before that she was the odd ball out and was sweet to me all the time and come up to be petted, she still does some but not as much as much as trying to chase me. Is this "normal"? "