Chemical Horn Infusions – A Poaching Deterrent Or An Unnecessary Deception?
December 2014, Volume 12-6

This paper was published in Pachyderm, the Journal of the African Elephant, African Rhino and Asian Rhino Specialist Groups No 55 (2014) January – June 2014. Download the full pdf at


Poaching for horn remains a significant threat to rhinos. Conservationists use various approaches to deal with the threat. One method advocated is infusing rhino horns with chemicals and dye. Promoters of this method claim the procedure renders the horn useless and that ingesting poisoned horn carries potential risk to the end-user. We visually examined white rhino horn that had been treated; we examined available literature; and we obtained expert opinion to assess several assumptions and risks associated with the approach. We found the information on which the assumptions are based to be weak, and refute claims that discoloring horns is a viable method. Our assessment contests the efficacy of this technique on conceptual and logistical grounds, especially when dealing with relatively large populations. We argue that conservationists should not use this technique to deal with the rhino poaching threat.

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Authors: Sam Ferreira, Markus Hofmeyr, Danie Pienaar, Dave Cooper