the cross you just described its very similar to the black sex link cross hatcheries do, a Wheaten(both buff orp and RIR are wheaten eWh based) Columbian(both Buff Orp and RIR are Columbian Co based, Buff Orps have other restrictors as well but they dont work very well on Extended black birds)
the black sex link hen above is E/eWh(E from Barred rock hen, and eWh from RIR) Co/co+(Co from RIR and co+ from BR) s+/-(s+ from RIR sire) a Buff orp rooster mated to a BR Hen would produce a very similar bird as the black sex link hen
Nicalandia, I am not able to make link, but if you surch here on BYC Buff Orpington and Barred Rock Crosses you will see what I am talking about. Buff Orpington cary Db, and other genes who make Sex Links lighter.
you lack the trained eye to distinguish between Co restricted bird from Db restricted birds, the birds you post looks nothing like the bird shown on this thread,
you on the other hand, have a keen eye, a eWh/eb Co/co+ hen, looks very close to eWh/e+ Co birds and infact the birds shown here may verywell be eWh/eb Co/co+ birds, just like the one you posted here...Nice find by the way
