Okay, now I'm confused.
I just googled "black rock chicken", and the first several hits are British sites which show a bird that looks like a black star -- black with red around the head. But they're calling it a black rock. Hmmm.
I just googled "black rock chicken", and the first several hits are British sites which show a bird that looks like a black star -- black with red around the head. But they're calling it a black rock. Hmmm.