this one came out with the head spot. it came from my Barred Rock's egg with one of the same 2 roos over her. lol, im gonna have some interesting looking chick when they start feathering out. good thing these chickens are just for eggs.not sure how you would tell. the blue roo can sire black chicks. both roos look like they are barred so that would not help you either. the silver barred roo I think has only one copy of the barring gene so he would only pass that long to about half the chicks. if the other roo is barred same thing. does the chick have a spot on its head?