My youngest hen, who is now approx 5 months (Ameraucauna) is acting diff towards my other 2 hens, they are approx 10 months old (Red sex links) she will charge at them with her head held real low now, and I cant tell if she is now trying to move up in the pecking order. She is now just a tad larger than my red heads and her legs are a signifigant bit thicker, so I was just thinking she was finally growing up and being a big girl and no longer wanted to be the bottom chicken. I have had the red heads for several months before I got her so she was the smallest, and at bottom of the pecking order. But they get along other than this happening every now and then.