Mark Zuckerberg eats only meat he kills himself [VIDEO]. The new diet of Facebook CEO Mark Zuckerberg is not for the faint of heart: He only eats what he kills.

“This year I’ve basically become a vegetarian since the only meat I’m eating is from animals I’ve killed myself,” Zuckerberg wrote in an email to Fortune.

According to Fortune, the idea came from a chef called Jesse Cool who runs a restaurant called Flea Street Café, close to Zuckerberg's home in Palo Alto, California. She introduced him to some local farmers who showed him how best to kill his first chicken, pig and goat. "He cut the throat of the goat with a knife, which is the most kind way to do it," says Cool.

Zuckerberg explains that his new-found predilection for slaughtering animals is just his latest annual challenge. Go here for video.

Last year, he challenged himself to learn Mandarin. The year before, it was to wear a tie every day.

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