I did that 9 weeks ago. worked GREAT! its called "grafting". only thing is I think you should separate her and her chicks from everyone else for at least a week or so. she will protect them the best she can but it is only the best she is capable of. and your chicks will be wild! mine are totally afraid of us. no holding them in the box in the house and "socializing" them. but broody hen is soooo much easier! good luckBTW WELCOME!!!!