I was guessing you were from China because of the Beijing Fatty in your avatar.Thank you for your reply. I'm in China. Since Bobtail Cochin came here, you have found that this local breed is very similar, but I am sure they are not a gene.
Trying to keep this feather color. But I think it should have more to do with dominant white.
Why do you think that they should be like dominant white? The other genes I mentioned are recessive to recessive white and are on the same locus.