Today my 9 eggs under a broody started hatching. I was watching her and she was desturbed by a new chcik under her that had just hatched and she started to peck at it very hard, she caused a little blood on head of the chick. I removed mamma 2a seperate pen adn put a heat lamp on the rest of the brood. I have had 4 out of 9 hatch and one has pipped. The chick is doing well so far but I hope it makes it. Is this a common occurance?