I have had my 11 week pullets now for approximately 2 weeks. They all seem to be doing fine, growing, eating, scratching, chasing each other around, etc... I'm just a bit concerned about Batgirl, one of my Barred Rock. She has always been just a bit smaller than the rest, but now she seems to be much smaller, like she's just not growing at the same rate as the others. I don't notice anything unhealthy regarding her behavior or physical appearance, but she's almost scrawny compared to the other girls. Is this something I need to worry about, or might she just be a petite hen?