Sorry to hear of your loss. 2008, I lost 16 birds (7 ducks, 7 Brahma hens, 2 Brahma roosters) in 4 days while I was gone to a horseshow. I was devastated! Most of my pretty flock, and all of my runner ducks!
My prime suspect - Racoons. Racoons LOVE water. I know that 1 racoon is not likely to...