Hens are easier to melanized and Fm is only one of the genes responsible for the full phenotype. I suspect mulberry Face and other enhancers are at playI was in the process of separating the first roo and upon closer inspection his fibro expression is only about 80% (guess) so my expectations for the first hatches would appear at this point to be subpar, nothing like the majority of his offspring. My assumption at this point is he is the culprit of leakage in a few of the offspring; roughly 1:14 ratio. So my question for now is; all of my breeder hens show excellent fibro expression. Can their offspring deliver the Fm-2 even though the roo could be an Fm-1?