My chicks feathers seem to break easy and they are super slow getting feathers so much so we can't let them outside yet though. The chicks were supposed to be 8 weeks when I got them, this last week they shot through the roof in growth but they even have pin feathers on their crests and naked 100% under the wings. Is it a vitamin thing(perhapes the older chickens would eat all the food) or genetics? Can I do something to help them. They also have chicken lice though they have been having daily dustings of DE.