I know that this is an old post but I have read on here so many times that a barred rock rooster will produce all barred chicks. This is not true! You can get barred but also solid white and white with black flecks. Here is a picture of what my Barred Rock rooster and Isa brown hen has produced...
I crossed a Barred rock roo with an isa brown hen and got 2 black chicks with yellow dots on their heads, much like barred rock chicks have. Then one solid white, and one white with a few black specks. Hope this helps.