I have 18 3-month old pullets and this morning I walked in the coop, my coop has no openings, but one was there lying dead half-eaten. Later I decided to put my hens up a bit early before dark. I put them in the run and decided to shut them up in the coop after dark, I came back to put them in and another one was dead, half-eaten laying in the exact same spot. the only thing that could get in that coop and would during dusk is a cat, and we have LOTS, AND I MEAN DOZENS OF THEM(Our neighbors have tons of unfixed cats that are breeding out of control.). Is it possible for cats to kill 3-month old chickens? None of our adults have been harmed.