Your chick is called a "duck wing" pattern. One looks like a silver DW and one looks like maybe a gold DW. Chances are if you or whoever you got them from purchased them from a hatchery they are Americana's. This picture is of an adult gold DW Araucana roo and one of his offspring. The roo isnt a good example but its all I have now. There should be more gold on his neck feathers and the wings should have more color. Just trying to help.
Actually, chances are good if you got them at the feed store they are not purebred Ameraucanas, they are Easter Eggers. Highly unlikely that a hatchery would have purebred Ameraucanas, or that a feed store would. But EE's are great fun, and lay lovely colored eggs. Enjoy your "mystery chicks!"