They get the same food as all my birds. I give them egg maker crumbles. Even the quail are eating it. I found they actually eat that brand and the other things I've tried they kick most of it around and it's pretty wasted. At $10 bucks a 50 lb bag, I'd rather feed 'em what they gonna eat ALL of. Makes for some major stocky birds (quail) for eating. They the size of softballs when dressed out. Won't eat my chickens!!
The closest nuke plant is quite a distance although I think the old man down the road is making some shine out back (JK) they may be sneaking out and getting in to his corn mash (that'll curl any hair, feather, or fur !!)