Bantam Birchen Cochin show quality

[Denali Farms]

I am looking for information on breeding for this color and to the SOP I have a cockrell and have purchased what I am told is a silver birchen hen and a black birchen hen. I also have black Bantam Cochin hens that are good quality. I am just wanting to get more information on color genetics to produce them.
Thank you

 

[Denali Farms]

I forgot to put photos of them. I want to do right by them and hopefully be able to show them one day.

 

[Amer]

A noble undertaking!
Silver birchen Cochins have an ER (birchen) gene and an S (silver) gene.
It sounds like “black birchen” probably has this genetics but doesn’t expre
Black Cochins have an E (extended black) gene, but depending on the bird they could be gold or silver based.
I wouldn’t cross these colors together.
Does this answer your question?

 

[Denali Farms]

Ok so keep the silver and black separate?

 

[Amer]

Ok so keep the silver and black separate?

Yes. And keep the “black birchen” with the birchens.