So how common is it to have a self blue chick with a lot of yellow down? I’ve never had a self blue chick that wasn’t solid self blue at hatch. Any that have had yellow down have been mottled or barred or very light blue. The only thing that makes sense is that this chick is self blue, but I’m curious anyway

Can the mottled gene mess with the chick down?
Parents -
Roosters: Black Mottled and Black
Hens: Black, Black Mottled, and one Self Blue
Baby that just hatched:
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Needless to say, I was surprised to get this chick because neither rooster was known to be split for anything…however the breeder I got the Black Mottled from DOES have porcelains as well, so guessing he’d be the split!