I have a mixed breed rooster that I really like, colored very much like a RSL hen, and I believe he has a red gene and a dominant white gene, so I can't use him to produce sex-link chicks. If I were to cross him with RIR and RSL hens, would any red columbian (RIR color) cockerels I'd get from this cross make Black Sex-Link chicks? In other words, is it possible for a red columbian bird to hide dominant white or barred? I'd really like a son from this rooster to make my sex-link chicks. One other similar question... My neighbor up the road has a BO rooster in with BO and BSL hens. If I were to hatch eggs from these birds, is it true that any of the cockerels could be used to make Black Sex-Links? Because apparently Black Sex-Link pullets don't carry the barring gene... I know these are kinda complicated questions, please let me know if there's anything I need to clarify. Thank you!