Couple nights ago found one of our month old chicks had been pecked to death, next night another on floor hurt trying to live, was stunned and eventually got up and went about business, last night turned on light to get eggs, and the remaining 3 chicks saw their momma and went to her to go to bed, and she attacked them, to point she jumped on smallest and tried pulling its head off, before I could intercede the 3 head hens jumped down to her roost and attacked her until she was dead... in which the rest of the flock swooped down and took the remaining chicks under their wings. This morning chicks are thriving with rest of flock but lost my favorite hen.