We're going to say what a lot of you are thinking: your chickens are being dramatic, and we love them for it. A possum crashes the run twice, one hen sleeps through the whole fowl play like a feathered log, and now the entire flock is staging a bedtime protest? That's not a security issue, that's a poultry soap opera. And honestly, it's the kind of chaos that makes keeping chickens so wonderfully absurd. You've got a free-range crew that's suddenly decided the coop is haunted, and you're stuck asking the eternal question: how long do you lock them up before they forgive you? We've been there, and we have thoughts.
First, let's talk about that possum. It got in twice, which means your run has a weakness, check for gaps near the ground or around the door, because possums are basically four-legged Houdinis with bad attitudes. Your girls are right to be spooked; they can smell that trespasser long after it's gone, and one of them sleeping through it just adds to the mystery. (Maybe she's the flock's designated nap champion, like that hen in our 18 Weeks and Still a Mystery: Hen or Fowl Play piece who kept everyone guessing for months.) As for resetting them, we'd say keep them confined to the run for about three to five days. That's long enough to break the possum-scent association and remind them that the coop is safe, but not so long that they stage a full-scale revolt. They'll be grumpy, free-range birds hate being grounded, but a few days of locked-up life beats a possum return engagement.
Here's the practical takeaway: after those three to five days, try letting them out an hour before dusk, then lure them back in with a favorite treat (mealworms are bribery gold). If they still refuse, add a nightlight in the coop for a week, possums are nocturnal, and a little glow can make the space feel less like a crime scene. You're essentially running a chicken therapy session, and it's messy. It reminds us of the egg-size confusion in Bantam or Bust: Our Egg-citing Size Mystery Unfolds, where everyone was chasing answers that only the hens really knew. Your flock knows something's off, and they're telling you in the only way they can, by refusing bedtime duty. Listen to them, patch that run, and don't let the possum win.