Poor do indeed. Lost dog dumped dog or some farm dog sloping off at night.
There was silage fields near me that held 4 or 5 stray sheep. One day then I saw 3 dogs from local farm walking the hedge row. One was terrier German shepherd and a collie. Lucky I saw them before me old dog as he wasn’t social fella. But over next few weeks them sheep disappeared one by one with just few bones laying about. My money was on them farm dogs even though the guy had his own sheep