BlueTheBrahma
Crowing
The blue colour when on extended black typically has a darker head (and shoulder/saddle on males). When it’s a blue copper you ideally want the copper to replace this so that the blue itself is pretty even across the board (though each feather should be laced darker). I’ve seen many blue coppers without copper, a lot of the time these are hatchery birds or even hybrids being called blue copper marans.
Mine have always grown copper in early on, at the same time as the black coppers, but my line is fully coloured so that helps a lot.
That’s all I can really say on the matter, but here are some examples of my blue coppers at various ages:
Mine have always grown copper in early on, at the same time as the black coppers, but my line is fully coloured so that helps a lot.
That’s all I can really say on the matter, but here are some examples of my blue coppers at various ages: