I had two chicks hatch yesterday morning. They have been hanging out in the incubator. Well, I've had three more hatch today and so far the two oldest have been pecking the newborns. One even grabbed onto the newborn's leg and dragged it 3 or 4 inches. I cracked the lid and grabbed the chicks as fast as I possibly could and put them in my brooder. I still have over 25 eggs left yet to hatch and I have plans later in the day. Is there anything causing this? I'd hate to come home and have a bunch of dead newborns because of a bully.