Johannesburg breeder John Hume says that making rhino horn more easily available will deter poachers from killing the rare animals.
Should we be saving the rhinos or the poachers driving them to extinction? The answer is not as easy as you might think.
Donkey skins are boiled down to form the basis of a tonic believed to increase sex drive and fight aging in traditional Chinese medicine.
The largest study of Javan rhinos suggests these beasts are hovering on the edge of extinction.
An international ban on trading rhino horn remains in place.
But experts worry legal schemes can't overcome poaching and illegal profits.
International trade in rhino horn is prohibited, but it can sell for $60,000 on the black market.
'Kenya is making a statement that for us ivory is worthless unless it is on our elephants,' President Uhuru Kenyatta said.
The rhino was killed by poachers less than 10 hours before Prince William and Kate visited Kaziranga national park.
It doesn't exactly match historical description of unicorns, however.
The environment ministry said it would appeal the ruling.
The Cincinnati Zoo is just awaiting final approval from U.S. Fish and Wildlife.
Rhinos were declared extinct in Zambia in 1998, ravaged by poachers. Today they are back and living in the wild once again.