This post makes me lean more towards fox...I was really hoping the manner of the kill would help shed some light. One bird at a time and they were completely gone. No traces other than feather piles. My girl today must have gotten free and run away and been attacked in multiple places around the run because there were several piles of feathers found. And one pile inside the run indicating it started inside. The one I lost a week ago I found only one pile of feathers outside the run, but the one I lost today was much faster and feistier. Also, my two smaller birds were the victims. I have 6 larger girls in there that are still intact. Now under lockdown until I get some answers and fix some problems!!