For those of you using a Biele Roo, ALL of you chicks will have a single copy of barring so they will all have headspots, the headspot as an indicator of sex in a mix only works if the hen is barred and the roo is not. However if Bieles are based on gold then putting them over a SLW will have sexlinked chicks with the males being silver and the females being gold

How do I know if my Biele Roo is based on gold? I wasn't aware of a distinction, but I am only 1 year into my obsession!
Here are 2 photos of Kaiser:
Thanks again!