I agree that she looks like an Easter Egger. She looks similar to my EEs. I know you said she eats and drinks well, but have you checked her poop to see if it is normal? I wonder if she has worms, coccidia or something. Her appearance makes me think that she is a bit lethargic. Being standoff-ish is one thing, but fluffed up is another.
She is a pretty girl! I hope she feels better soon!
