Since black golds were made originally by crossing brown red with buff, I would cross in a buff - if I could find one that is truly golden yellow buff and not orange. That way you would not have to go outside the breed. Also, the golden phoenix is based on wild type at the e-locus, and the males are half sex-linked silver and half sex-linked gold; so they would not breed true. Their \"gold\" is not true breeding, it is made by mixing the the two colors. Plus you would be bringing in genes that would cause white in the earlobes, which can be very difficult to eradicate. Plus the large fowl are smaller than Ameraucanas. Not a good plan in my estimation.