Nice large pen with 11-12 week olds. They have plenty of room and plenty of water. They are pecking the tail until it starts to bleed and then they are eating the poor chick alive. As soon at the outer skin breaks the inside is history. Just lost 4 and injured 6 withing three hours. The pen is huge so I have no idea what else to do!!!! I am having to invest in blood stop... Advice please. O feed they are getting is about 16% and they get scratch to keep them busy but still going after each other!!!