[greenkey]

https://en.m.wikipedia.org/wiki/Spanish_Fighting_Bull

“During the breeding, in order to preserve their natural characteristics, the bulls rarely encounter human beings, and if ever, never on foot.

...

Some commentators trace the origins of the fighting bull to wild bulls from the Iberian Peninsula and their use for arena games in the Roman Empire. Although the actual origins are disputed, genetic studies have indicated that the breeding stock have an unusually old genetic pool.

The aggression of the bull has been maintained (or augmented, see above) by selective breeding and has come to be popular among the people of Spain and Portugal and the parts of Latin America where it took root during colonial rule, as well as parts of Southern France, where bullfighting spread during the 19th century.

In May 2010, Spanish scientists cloned the breed for the first time. The calf, named Got, meaning "glass" in Valencian, was cloned from a bull named Vasito and implanted into a Friesian host mother.”