I have 6 hens (2 easter eggers, 2 rhode islands, and 2 barred rocks) who have all been raised together and never have had an aggression or pecking issue, not as much as a broken feather. They are now around 16 weeks old. Yesterday morning I wake up and go out to check my chickens and one of my Rhode Island Reds has been viciously attacked with her feathers and skin lifted from her scalp and one of her eyes missing. I do not know if this happened inside of the coop or outside in the run. I saw no signs of bloody beaks and saw no blood inside of the coop but I am at a loss. I separated the hen immediately and am providing wound care and have her in the house. Did my other hens do this? has anyone experienced this before? it is possible she could have been attacked through her cage/run prior to going in the coop at night I guess. I just have no idea what would cause or do that. I have an omlet cube with a run extension..It is supposed to be predator proof. Can anyone shed some light on this or provide advice. I don't want this to happen to any of my other hens.