Yes this is very exact Alessio, but ..... Cocincina & Orpington as all other chicke-races have the same ancestor (gallus gallus) so many many generations ago, my approach in this is, if we go back a few steps in the evolution (for taking a color mutation in an other "race") and than go again forwards towards the recently (a couple of decades ago) established Standards for every chicken "race" separately, we do no harm to that specific "race" .... I think ! Yes ?