Gold in the neck of the Rooster? That is a cross at best. Do you have pictures you can post? What color egg does the hen lay.
A lot of Black chickens are sold as Australorps. Often a feed store will order in a couple hundred chicks en masse and then toss them into sales brooders without knowing what they are.
Black and white chick? Australorp....Often they are Black Sex links.
Obviously! I am amazed at the Black chicks that are sold at Hatcheries, Feed Stores, etc for Black Australorps. I am also amazed by the people that fall into that trap. If they just want egg layers no big deal but then they need to know they have mutts and post on the Black Chicken thread not the Black Australorp thread. It is really confusing to see Black chickens from A to Z being called Australorps.
A mutt is a mutt. I have owned a lot of mutt dogs and Loved them dearly, but I never told anyone I had a Rottweiler, Border Collie, etc., etc.
Dan
X2