Haha, yep none of those. At least not that we or anyone else have seen. We do have mice, though, and if the wounds on her legs happened after she died I wonder if mice were chewing on them once she passed. Which would still leave us wondering about the cause of death. The coop is warm, but we usually leave the little door open to the run unless it is extremely cold and blizzardy. We had no troubles with them during winter last year. I'm thinking now that might not be such a good idea if there's a possibility of a duck getting a "wild hair" thinking it will be okay to sleep outside.