 Diclofenac is given to working and ill farm cattle to reduce pain so that they can work on the land for longer.Farmers leave dead farm animals out in the open for the vultures to tidy up, and the vultures then feed from the carcasses of the cattle that die, and are poisoned by the diclofenac contained in the flesh they eat.Vultures are now not present in large enough numbers to tidy up all the dead animals.