How terrible! Here's some info I found on Welp's site about raccoons:
Takes small birds whole, adult guineas, grown ducks, large turkeys and geese-eaten where killed, eats breast only, usually takes head off too, but not always. Adept at squeezing through openings and using paws to remover birds from cages if cage door is flexible. Will come back nightly or every other night (even if freed from trapping). Loves eggs. Bits of coarse fur may be found attached to entry. Strong animals, need good traps-four spring-type jump traps set near entry.
Do you have access to a live trap? You can put some smelly food in there and maybe catch the culprit. I bet there is more than one. Or a mother with babies in tow.
Or your local Fish and Game Dept. might have some ideas. They might have live traps you could borrow.
Good luck!
