I have an ameraucana chick that looks kind of like that. About the same age. Not sure what caused it!
Bad hair day???
I kinda wondered if she was not very adept at preening in the beginning. I don't know if the feathers would grow funny like that if she didn't get the white casing stuff off or not, but it was a theory. Most of the feathers look normal, but some are sort of pointed and curled. Of course... hers did come in much more slowly than the others too so that wouldn't be a lousy preening issue. All I know is that she's easy to pick out in a group of white pullets... she sticks out like a sore thumb!