A couple weeks ago two possums got into the coop and ate the eggs while traumatizing the chickens. Now they won’t lay eggs in the coop (I have no idea where they’re laying) and one chicken will not go back into the coop at all. They’re free range, but I lock them up at night. We were out of town for two nights and that’s when it happened. I tried locking them in the coop for two days to maybe “reset” their little brains, but it didn’t work. Any suggestions on what to do??