We have 2 broody hens, and they have 4 chicks, 3 of them are a month old, and one is about a week. For some reason, the broody mother hen keeps chasing the smallest baby chick away and biting its head.? We had a baby chick and found it skelped and it was 4 days old, maybe that hen did that to it. I dont want the hen to kill the chick, so is there anything i can do to help??