I am sorry for your loss.. It stinks to have critters come in and kill your chicks.. we lost a couple this fall from a mink, the heads were gone and nothing else.. What are you baitin your trap with? We never caught the mink but we set the trap with a couple of fresh eggs, a golf size ball of hamburger and a can of cat food and caught 2 coons and a possum.. I hope you catch whatever it is.. I hate killer critters