it's normal for her to peck at them, she needs to get their attention, it's the start of learning that she's the Mother. she shouldn't be pecking them too hard tho'.... if she's letting them eat, all should be just fine. don't take the chicks away. take the egg when she abandons it... she probably will keep the egg for another day. Peach pecked at all the new chicks I've given to her... as for color... I could give Peach a tie dyed chick and she'd take it...