You need to breed down regular American gamefowl to get bantam sized. I know someone who has been working his lines for a few years now and last I heard he's doing well. Anything other than American gamefowl is not American gamefowl sorry. Then if they are bred very tight that makes them smaller anyway so that along with breeding down should get you where you want to be in 5 or 6 years maybe more I don't know