I have 6 Rhode Island Reds and 6 Delawares. They are about 9 weeks old now. They are all outside now in their chicken coop and outdoor areas. We live in Florida and we have water inside and outside, as well as food inside and outside. Several weeks ago 3 of them were pecked on their back sides and were bleeding.They were the RIR's. We separated them until they healed, and then put them back together. Today, one of the RIR was pecked again and bleeding on their backside and now neck. I have separated her from the others. What is causing this????? They have plenty of space, food and water. Can someone with experience please help me? I want my girls to get along and survive. We are using them as a food ministry when they get to the age of laying eggs. We care for them and make sure that they need everything. Please HELP!