I'm so glad I found this thread. I have a pullet with similar plumage and we were worried something was wrong. We're still watching "Scratch" to make sure she stays warm enough even though she has been moved out of the brooder. Her sister "Chipmunk" is pictured to show the difference.
Scratch:

Chipmunk:


Pretty girl:


^ Best picture I could get of them together, Chipmunk is camera shy.
Scratch:
Chipmunk:
Pretty girl:
^ Best picture I could get of them together, Chipmunk is camera shy.