My neighbor lost all his chickens to his own dog s, coyotes,foxes,owls,coons and hawks in a similar set up. An open shed in an open fence makes them easy prey.Good luck!
I can still remember my dad jumping up and waking up everyone in the house to rescue his chickens from predators. They roosted in trees too. Mine will serve a life sentence behind bars and hopefully live out their life underneath a tree instead of in one.I wish you the best with that possum in...