Spain is home to the largest population of vultures in Europe, but their numbers are steadily declining. A new drug for cattle now threatens to wipe out the vultures altogether. Vultures have long had a bad reputation in Spain. Time and time again, the birds are illegally poisoned, because they are said to prey on living cattle. Now the EU has authorized the administration of veterinary diclofenac to livestock in Spain and Italy - a deadly threat to the four species of vultures that live in Spain. The anti-inflammatory drug has already led to the near-extinction of the vulture population in India, Pakistan and Nepal. The birds ingest the substance when eating the carcasses of cattle treated with the drug, and die of kidney failure.