I have 15 big girls, my barred rocks and my black sex link are nice and plump. But my leghorns and comets are very skinny. I have checked to make sure there are no mites/lice so that isnt it. My barred rocks and Reds are the only ones that have all their feathers too, i think i know who is running the roost! Could it be the breeds or do i have food hogs?