Thanks, I am always Open minded to learning new things. Thanks for the Education!With a RIR mix, it would depend on which side the RIR is on and what the other side was.
Remember a commercial Black Sexlink is typically a RIR roo (or NH) over a Barred Rock hen. The pullets are black with red bleed through, some with almost no red at all. (I have one BSL gal that you would have to look hard to see any red while another has red only at the hackles while another is laced down her chest with red.)The BSL males look just like a Barred Rock with a bit more double barring effect but no red.
If you reverse the pairing, the Barred being the roo and the hen being the RIR, all the chicks look like the Barred, with little to no red bleed through (as my memory serves).
Lady of McCamley