Leghorn mix? Strange wing feathers

[gbartha]

Here is my little mystery chick. She hatched out of a huge pale blue egg (72 grams). She was suppose to be an ameraucana but lacks the legs and cheeks. Maybe a SBEL (super blue egg layer)? Her wings are coming in very skinny compared to her hatch mates. Thoughts?
Top spotted chick is the mystery. The middle left is a blue ameraucana, middle right is a EE and the bottom chick is a splash ameraucana.

 

[CascadiaRiver]

I've had Easter Eggers without beards before