[S]ince rhino poaching isn’t slowing, horn “unmarketing” must become more aggressive. A cunning approach has been devised by a South African firm, Rhino Rescue Project (RRP). For about $600 per beast, RRP drills two holes into a sedated rhino’s horn and pumps in a secret cocktail of toxins into its fibres. Consume powder from that horn and expect a migraine, nausea, vomiting, diarrhoea, or, after a big serving, permanent twitching due to nerve damage, says RRP’s co-founder, Lorinda Hern. Signs warn of the dangers of illegal horn. RRP has treated more than 300 rhinos in South Africa since 2010. Since the horn is dead material, the firm says there is no danger to the animal. A private reserve near the northern South African town of Phalaborwa paid RRP to treat about 30 rhinos. “We’re trying anything,” says one of the owners. Locals were invited to watch so word would spread. Poacher incursions dropped from about two a month to just four in two years, with no losses.
Excerpt from Saving the Rhino: A dilemma of horns, Economist, Aug. 8, 2015, at 42