I agree on the raccoon,get a livetrap ,borrow,or buy one,sardines make a great bait,trap the raccoon and drown it in a barrel of water,you will not have chickens unless you rid yourself of the problem,raccoons are beutiful animals and fun to watch in the wild,but they are ruthless,deadly killers,,sorry about your loss,I know its heartbreaking,,good luck with your chickens,,