Came home from vacation to find a dead and partially eaten duck. He was alive yesterday morning, found dead this afternoon. The rest of the flock was untouched. I am trying to figure out the culprit. Please help so I can protect the others. The Details The Duck A very large male Ancona. The biggest bird I have. It probably weighed 7-8 lbs. The Run We have our ducks (2) and our chickens (8) on a third of an acre, mostly open grass, but some tall fir trees and shrubs along fence on all sides. It is fenced with a 5 foot tall wooden fence. Within that, there are two smaller runs. The ducks are kept in a 15 x 15 run surrounded by a 4' tall hardware cloth at night. There is a wooden duck coop and a small pond. It is uncovered, and there are several tall fir trees in and around this area. Because we were gone on vacation and have never had issue with predators (live in town, have never seen a raccoon in the area, tree cover made me think birds of prey were unlikely, neighbors had never lost birds) we left the chickens ranging around in the yard and the ducks in their run, with coops open at night. Someone came daily to feed/water/collect eggs, and says he was alive yesterday morning, in his run. The Remains/Injuries: The Duck had been removed from the run, and was on the complete other side of the property, close to the tall wooden fence. There were downy feathers and a few larger feathers scattered around. Head and neck had been completely eaten. Looked as if the crop was completely gone as well. There were two injuries on the back- I am just guessing at the anatomy here, because it was pretty gruesome. It looked like maybe the liver was gone, and then there was a wound in the area between the wings- but it might have been just a bit torn open, hard to tell. The weirdest thing was it looked like something had chewed on or broken the bill- the bottom and top were facing different ways and the front half of his upper bill was totally missing. Tonight everyone is locked up in their coops.... but I don't know if I need to change fencing, add bird netting, change coops.... I am sure my dogs being gone while I was on vacation didn't help with prevention either. We live in a rural and forrested area in Western Washington, but our house and property are in town-- We live a few blocks from a forested park and a river, but there are many houses, paved, streets, all that. Several other neighbors have chickens and never lock them up at night- they are loose in the yard, and have never experienced a loss. We have never seen any animals on our property aside from the neighbor's cat and dog, and some crows and squirrels. There are reports of cougar, bobcat, coyote, raccoon, possum, bird of prey including owls and eagels, etc.- they just tend to be seen at the edge of town.