All but *counting in my head* four of my many chickens have been feed store purchases. (Oh, and my first GrandChick hatched from one of Rebecca's eggs by broody Buffy, plus the five little incubator hatchlings who broke out of their shells this past Saturday. But they're not "the flock" yet.) So that's 20 surviving feed store chickens and 2 ducklings.
I bought two laying hens from a BYC member and love 'em. I bought two "pullet" bantam cochin chicks about 5 weeks old from a breeder and one was a roo which my own dog killed, and the pullet - which I LOVED very much, she was gorgeous and friendly - died about a week or two ago shortly after she started laying..... from being eggbound.
I think from now on I'll be going the incubating eggs route. Of course, I could be seduced by feed store chicks again, very easily. Or I'm sure I wouldn't mind getting chicks or chickens from another BYC member. I just don't think I'll be scouting CraigsList or making long drives out to farms to pick up non-hatchery chicks from breeders.
I've been VERY happy with my feed store purchases.