> when a cow dies in Spain it's disposed of rather than being left for vultures to eat.
Sure. Do you remember extensive cattle farming?
The Fapas organization was what saved the vultures in Spain since 90's. Its main goal was to assure a steady supply of dead cattle so the vultures can eat. They sow the seeds that allowed the reintroduction of the bearded vulture decades later.
The difference between India and Spain is that we eat the cattle. Diclofenaco appears only in work animals, racehorses, etc.
Most of the time, when you find vultures poisoned in Spain are on purpose not necessarily with this product. That superstitious behavior is getting less common.
[en_GB] https://www.theguardian.com/environment/2021/apr/11/rare-eur...
[es_ES] https://www.eldiario.es/sociedad/alerta-diclofenaco-medicame...