What do they do to the bulls that die in bullfights?

Answer 1

I assume they sell the meat, but maybe they do something else with the bodies. Animal bodies are full of resources; the fats, oils, skin, hooves, and even teeth can be made profitable in some way.

Answer 2

In 'olden' days, if the matador put on a really good performance, he was symbolically awarded an ear. That meant he could claim the meat of the animal as his own after the fight. Today, most really good matadors are well paid and have no need for the meat. The bulls are butchered immediately after death and the meat is either sold or given to charity.

Answer 3

The bull is butchered and the meat is either sold to specialty restaurants or donated to charity. It is not wasted.