hi... i'm brand new... to this forum and to chickens. one of my one month old chicks isn't growing her feathers like the other one is... they are the same age, but different breeds. otherwise they are the same size, except the wing and tail feathers. she also doesn't preen as much- some of her tiny feathers are sort of hanging out and the shafts are visible. i'm not sure if this is normal or an indication of an illness... any advice will help. thanks.