CARTAGENA, Spain—More than 850 cows that spent months aboard a ship wandering across the Mediterranean are not fit for transport anymore and should be killed, according to a confidential report by Spanish government veterinarians seen by Reuters. The cows were kept in what an animal rights activist called “hellish” conditions on the Karim Allah, which docked in the southeastern Spanish port of Cartagena on Thursday after struggling to find a buyer for the cattle during the past two months. The beasts were rejected by several countries over fears they had bovine bluetongue virus. The insect-borne virus causes lameness and haemorrhaging among cattle. Bluetongue does not affect humans. The veterinarians’ report concluded that the animals had suffered from the lengthy journey. Some of them were unwell and not fit for transport outside of the European Union, nor should they be allowed in the EU. Euthanasia would be the best solution for …