I have a small black hen that has taken up with my buffs. the buffs are less than 2 y/o and have not yet been broody. however, the black hen has started to sit on a nest for the past two days . I believe she is a bantam as she is smaller than buffs with smaller eggs. will she be able to hatch and raise mixed breed eggs? some eggs are from black hen and others, larger, are from buffs. not sure how this will turn out. hen is in nest box of coop about two feet or so off the ground. this is sw ga but a cold snat is here 30s and cooler. any knowledge/advise would be greatly appreciated.