We have a hen who went broody, so we let her sit on a clutch of eggs...the chicks are 4 wks old now and is it possible that the hen could be moulting now? she's lost a lot of feathers, and her comb and waddles are very pale....have been since before she started losing her feathers....she's eating the same food as the chicks, which is starter and I've read that it's fine for the hen....thoughts? btw, she is acting perfectly fine.