chick isnt growing feathers

[chickens4eggs]

I've attached photos of two of our chickens. Both about 7 weeks and the same breed. One is not growing wings but is almost bald is many places! What can I do?? I can't get the photos to upload. I'll have to try from my computer. But any ideas?

 

[Habibs Hens]

could be a mutation

also

 

[Mac14]

Hmmm...