seriously, who in the world would want to, or could do what is evidenced at these scenes? surgical precision, no blood, no tracks. odd lights often reported.
many ranchers in the US were patrolling their land armed because they had lost so many cattle to this occurence.
its' weird, but i do not suggest any likely cause, because it is so bizzare.
When the old AEC was forced to open some of its files, an account surfaced of a purposeful radiation release at Hanford, followed by the secret snatching of several downwind cattle for examination. Perhaps there is a continuing worldwide program to monitor the damage done by nuclear testing during the cold war.
And the green dwarf comment was quite serious. Many in Argentina are convinced of the truth of its reported sightings.