#4 does look close like a Barred Rock Bantam but I put the pictures side by side to young & adult pictures I could find. All the Barred Rocks seem to be more grey over all basically. This chick is really white, more white with thin grey stripes. She hasn't fully feathered so I'll keep watching her. I don't mind having a Barred Rock & I know each chick & chicken has their own differences in patterns etc so maybe that's it. The more white is just making me question it.