A woman feeds a lion with a bottle of milk
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Would you hug a 'domesticated' lion in a zoo?

17 March 2014 Last updated at 09:37 GMT

A zoo in Argentina claims to have developed a system of domesticating wild animals, which is so effective that visitors are allowed to touch the zoo's lions, tigers and bears, and even feed them by hand.

But experts say such close proximity poses a serious risk to animals and humans alike.

Ignacio de los Reyes reports from Buenos Aires.