We had a bear pass through town a couple of years ago. Also, something took one of our ducks - but mostly that seemed about the killing - they didn't seem to eat much of it. We're assuming it was a trash badger (i.e. racoon) because it figured out how to unlock the coop. Problem solvers, those guys.
We gave away our remaining duck - as it felt bad to have a lone duck living in the same place her buddy was murdered, and we weren't in the market for another. The woman that took her has a bunch of pet ducks that she liked to cuddle - and, from the photos, it looked like our duck was going to have a much happier life with a flock, more room to forage and a bigger swimming area.
(That was Jane-Duck. The murdered one was Janet - who was literally a lame duck. Jane's brother, years earlier, we had to give away when he matured and became highly aggressive. He went to live as a duck-stud. Lucky duck.)