I still say put out motion detectors, then you can get out their BEFORE they kill again, see what it is and dispatch if needed. Last night a feral cat tried getting to mine and I scared it off before he could get in cause the alarm went off. If he tries again his rear end will be lit up. I also have "predator eyes" around the coop and they have been successful at keeping the foxes away. Every time I used bait and or traps I have ended up attracting more predators so I say NO to bait.