if the chick hatched with a white/yellow hatch down ,than it is a Wheaten throw back .
if the chick hatched black than it is a mutation . or some thing disturbing the combination of the Autossomal red genes .
we get some time Wheaten cockerel with a Black wing triangle ,doesn t mean it is a cross of a Black copper .
it is a same thing as a BCM cockerel without a Red shoulder .doesn t mean it is a cross to a black strain .just a luck of the Autossomal red genes .
@kfelton0002 . what your friend are saying about a overly marked BCM cockerel chest is not true .they are just talking not based on any genetic explanation .
I said many time before .when we work with a patterned chooks .we have to keep the balance of the color .it is a reason we have SOP .because the genetic will never throw 100% guaranty .
there is a lot mutation as well .a chooks mutate a lot .it is a reason we have so many breed and varieties .
some time we get a overly colored red BCM . still is a BCM not a buff or mixed with a buff .it is just overly marked .that all .disorder of the Autossomal red genes .
@kfelton0002 . you BCM are pure as they can get.
chooks man