We recently re-installed a few hens in a long abandoned coop. All has been well for about a month .....until today - 1 hen foully ( sorry) murdered by culprits unknown. The hen was lying dead in one corner, partially covered in leaves - the floor of the run is leaf covered, the run is overhung by mature oak/alder. There were a few feathers missing from one side of the chaest but no major damage. Only one bird was attacked.... I've scouted all round the coop - no sign of forced entry, no tunnelling under the wire - undisturbed leaf litter all over. 3 sides are chicken wire, two layers high strung from deer-fence posts, the remaining side only has chicken wire single height, deer fence above. Am I looking for an agile fox getting through the deer fence 3 feet up ....or a pine marten ? - we have both locally.