So sorry! Keeping chickens is a constant education in just how clever a motivated predator will be! My brooders, coop, and soon the run, are as safe as I can make them. We all learn through experiences like that. Mary
Very few cats will go after adult big chickens, but small chicks are definitely at risk, and a few cats might go after bantams. Broody hens will protect chicks from cats, but otherwise chicks are vulnerable. Mary