Thanks Kev,why do you think that the brother to the pullet has white legs?I will have to check the leg color of the blue cuckoo olive egger hen.Could there also be dominant white in the line,and would that result in white birds?
He's also cuckoo, just can't see it due to his being white- we know he is cuckoo because his mother was & it's sex linked(white pullet does not have cuckoo for the same reason).
Cuckoo/barring also has the side effect of interfering with pigmentation in the dermal layer in the leg skin.
Another possibility is a gene called Id- Inhibitor of Dermal melanin. It's also sex linked and inherits the same way as cuckoo/barring does. it's possible for the boys to have both Id and cuckoo resulting in very clear legs.
A white skinned bird with cuckoo and/or Id will have white legs... a white skinned bird lacking Id or cuckoo will have blue legs. It's yellow & green legs, on yellow skinned birds, respectively.
for dominant white to be a possibility, it's necessary for at least one of the parents to have it, just like with the NN gene. So with a gold laced roo, cuckoo hen, that's simply not possible.