I have an indoor riding arena and some of the chickens roost up about 20 feet in the air in the rafters. This morning I go out to check my meat birds in the arena and there is one of the laying hens dead. No blood, no claw marks, nothing. I have no idea what happeend to it. I plucked a few feathers to see if it had any talon marks, but nothing. I thought maybe an owl might have come in the arena. I don't mind doing a autopsy but don't know what to look for. Any ideas of what happened or any suggests what to do.