My hens are large and they are half Ameraucana. Bred to a good, black Ameraucana rooster, all of the cockerels from that cross would be chocolate carriers and would work great for what you want, better yet, breed one of those cockerels back to the chocolate hens and a chocolate cockerel that is more than 50% Ameraucana would be perfect.smoothmule - My plan was to start with some (hopefully) larger bantam Choc orps, and go from there. My ultimate goal is Choc Ams that lay a perfect blue egg.
If I had access to a really good black Ameraucana, I could breed them later this summer when I'm finished using them for my other projects.