I have 4 hatched out Cochin chicks. Some carry the frizzle gene and I'm concerned about one chick in particular. She has barely any feathers growing in. The white chick had lots of feathering within days. There is an all black one (hard to see in pics) that is second in great feathering. And a blue chick is starting to feather out but this last chick has only a few on wing tips. What is wrong with her?