I believe he got some from Don Nelson for one. Wherever else they came from he has some nice ones. I've shown against him a few times-sometimes successfully, sometimes not. I had Red Bantams for 25 years until 2012 when I gave them away.
Bill has some pretty nice Red Bantams. He beat me more often than I beat him. I know that at least in part his bird come from Don Nelson. Not sure what else may be included.