This sounds like a raptor issue then. If completely dark then owl, as hawks rely on keen eye sight to target their prey. I have heard redtails around my property at dusk but never an hour after.
Interesting story about owls, a large barn owl opened my screen door on my porch to come after my wood duck in the middle of the night. I can only assume that he had been watching my cat pry it open, there are quite a few claw marks at chest height in-between frame and door. My duck is fine but that specific owl is never going to go near a broom again in its life. I really should have gotten some pictures, I mean this thing was trapped and looking at me like what the heck as I was beating it back out the door.
Hope your chickens are doing OK.
Attimus
Interesting story about owls, a large barn owl opened my screen door on my porch to come after my wood duck in the middle of the night. I can only assume that he had been watching my cat pry it open, there are quite a few claw marks at chest height in-between frame and door. My duck is fine but that specific owl is never going to go near a broom again in its life. I really should have gotten some pictures, I mean this thing was trapped and looking at me like what the heck as I was beating it back out the door.
Hope your chickens are doing OK.
Attimus