I heard a lot of people saying possums weren't a bother. I live in a rural piece of a city, and we have opossums everywhere. They only bad animal attack we had was from a possum. It was maybe 11 at night, I woke up to a racket outside the house, the coop we had at the time had a lid you can lift out, thank god for that, the lid had fallen and the girls went flying out the top and outran the possum. They're pretty slow mammals. Anyways.. the possum went running when I flew out of the house yelling in my robe with a broom. It was a funny sight really, me in my robe with a broom, the rooster protecting his gals, and the house cat wondering what was going on; all chasing this possum. He had tried to grab one my roosting chickens of their shelf. The chicken had ran and hid behind the shed. She had a pretty bad gash/bite on her rump from her back down around her thigh. She recovered fine though. Thankfully that was the only bad attack. We don't have much more than possums, and I've not seen much of raccoons. Not even a couple dead on the road, just possums, we eventually trapped and relocated a couple, fixed the coop up better with a better latch, and a roof that doesn't fall. I know that if that roof hadn't come off when it did my girls would have been stuck in the coop with an extremely sharp toothed predator. I feel that when they can't get out of the coop and run from the predator, they're sorta sitting ducks. But it's better they don't get it in at all.
We also have a motion sensor light around our coop now. I see it pop on every once in while at night. Has anyone had an issue with predators eventually getting used to a motion sensor light and ignoring it? I have no idea what pops it on, as we have cats roaming around, and tarps blowing in the wind.