We have lost plenty of chickens to predators over the years. Hawks, coyotes, foxes, possums, raccoons, stray dogs and snakes (along with who-knows-what else) have taken their toll. Free-ranging chickens have plenty of threats to worry about.
But other than one chick taken by a snake in daylight, we’ve never lost a chicken in the chicken house.
I like to think we have the Alcatraz of chicken houses. Lacking the skill to build a coop myself, I just bought a storage building and added nesting boxes and roosting poles. The building sits on blocks, so there is no way a predator could tunnel into it. When the chickens go in at night to roost, we shut the door, keeping them safe from any nocturnal predators. We also have a woven-wire fence around the coop, with three strands of electric wire (although we haven’t energized them in a while).
Whatever threat nocturnal predators may pose to other animals on the farm, the chickens are secure and safe.