We have 6 chicks, 10 weeks old. This one is and has always been much smaller than the others. She has always done her own thing, doesn't play around with the others and makes a funny squawky noise. Her butt doesn't have any feathers and skin is a little red but poop seems normal. I was worried about crop issues but she seems to mostly empty overnight.Anything I should do for a tiny chicken? Or is the no feathers around her butt a big deal?