Now that is something to consider? They are first gen chicks directly from GFF. I wouldn't think they would have gotten that far into line breeding though??
I can be wrong here ( perhaps our irish friend can enlighten us) even pre gff you are working from a limited gene pool. Its illegal to take them out of france And there are from a small batch of smuggled chickens yes? So not a lot of debth there.
Im sure someone will correct me if I am citing urban legend.