I wanted to share this culling cockerel with you. He demonstrates very clearly how the autosomal red/silver and the birchen/black copper are separate! He's got very clear silver hackles and saddles and a very red shoulder with no silver on his shoulder!!
he's got a lot going on but he definitely shows that there are more than one Gene controlling red and silver expression! Talk about copper bleed through! Lol. Most of my other cockerels are thankfully much better colored than him, but I wanted to share.