Judging by the dark colour of the rotting pelt, this is a Mink jawbone. Apparently they are here on the island because they were released in to the wild after a mink farming enterprise went bust. 40 years later, and they are a real problem for ground nesting birds.
Yesterday afternoon S found the remains of a Barn owl which we presume had been predated upon by a bird of prey - perhaps Peregrine or a White tailed eagle. A very sad discovery, particularly as we had been seeing Barn owls round the Barn owl nesting box and were hoping...
D came over and helped S put the last lot of ewes through the fank - and they are now back out on the hill.