Walking by the coop (a new coop they had all to themselves) where the hen and her babies were I heard lots of cheeping. The mother hen and some of the chicks had picked another baby chick's back raw and bloody. They have lots of room all by themselves, plenty of food and water. This chick has all her tail feathers and had no prior wounds. Why would the mother turn on her? I removed the mother to the back yard where all the other chickens are. She's not happy but now I don't trust her. She has taken wonderful care of them for almost three weeks. I brought the wounded baby chick in the house and treated her wounds with antibiotic cream and then wrapped a bandage around her. I put her in a plastic container with a stuffed animal (food and water, too) and covered it with a towel and heating pad on low. Her wounds are so bad it will be a miracle if she lives. Everything was going great. I'm so glad I happen to check on them or she would have been pecked to death.