Nice photos of barred - do you know what those chickens actually are? Are they CL X Isbar? -- do you know the entire genetic sequence for Isbar (a bit off topic for CL hybrid thread....but it is something I haven't seen anyone with the knowledge of.) Thanks! Are the above autosexing by headspot?
those are Auto Sexing Silver Cuckoo Marans(based on double barred Birchen) the Males headspot is much larger than females and the chick down its about two shades lighter than females.. while females also have headspot its much smaller and the chick down remains dark
the genetic sequence for Isbars are ER/ER(Birchen) S/S(Silver) Bl/bl+ b+/b+ and some form of melanizers as they look more melanized than regular birchen(some pullets may appear solid blue)