Local breeders! At first I planned to order from mypetchicken.com, but then I discovered that the person we got our doves from also was raising chickens. We are so happy that we got our chickens this way. Our chicks were not stressed from shipping, and we were able to see the parents, see the husbandry conditions they were kept in, and judge the health and quality of the stock before we picked out our chicks (we also got to pick the ones we wanted ourselves, too).
I've since learned more about the chicken hatchery industry, and I'm really glad I didn't participate in that.