If started with eggs, sure. I had a friend who reared a clutch of peafowl eggs under a broody bantam because the peahen would not set on them in a safe place (she didn't want the peahen becoming coyote chow out in the woods). The one thing you need to be aware of is turkeys can get blackhead from chickens (so can peafowl). The bantam took great care of the chicks, though, and raised them up as her own. It was rather hilarious when I did some chores for her, going into the coop and seeing the bantam try and set on and cover all the chicks once they started growing! She couldn't cover them if her life depended on it, but she sure did try! All grew up to be healthy.