All i know is that i have had a few batches of barred rocks and i have gotten ones that are grey with white stripes and ones with more black than stripes and they where all pullets! not sure about the yellow color your talking about...but i would wait and see when they get read of their chick fuzz;)
I have been getting chicks from the feed stores around the area for the past few weeks. I am starting to notice that on their legs they are getting what looks like a hook or claw. I was wondering if the hens get a smaller version like the roosters. If not I might have 5-6 out of 10 chicks...