If a large Owl ate its head off it would have a light carcass to fly off with and eat somewhere safe.Once the heads eaten and the cavity opened up the entrails can fall out. A fox would have eaten the whole chicken someplace else and not partially ate any of it. The chicken would have been...
Because of the absence of a body I would normally suspect a fox but they don't eat on site.They will "trot off" with them as Asadora stated! Whatever it was carried it a short distance away or you would have found it. Furthermore it scared the goose so badly it won't return which means it...