Can Owls Grab 15 Ducklings in a Single Night?

[Woolhouse]

Never had bobcats around here. Fishers are a big headache, but they can't seem to handle the double fence.

 

[Woolhouse]

To prevent a repeat:

1) Locking them in the shelter so they don't sleep outside and exposed. Why they do that is beyond me. Chickens always sleep indoors when they can. I guess ducks are closer to wild.
2) I put nylon netting over the run.
3) I let Maggie, our Border collie / lab / something-that-climbed-over-the-fence sleep in the garden. She has killed foxes in the past. I wouldn't bet on her against a fisher, but she'll at least make 'em think twice.