Another problem is that they will hoard their horns and thus drive up the price of rhino horns in the market. Rhinoceros horns are renewable and can therefore grow back. This means they can be harvested every 12 to 36 months and sold. This may be combined with dehorning as a means of preventing rhino poaching. This regular dehorning will therefore reduce the horns available to rhino poachers. However, this problem contradicts the need to conserve rhinos. Conservation is necessary to protect rhinos from poaching so their horns can be used in traditional Chinese medicine. Rhino horn poisoning: Another alternative is to inject a mixture of parasiticides and permanent pink dye into the rhino horns. This toxic mixture risks making people who eat rhino horn seriously ill. This drastic strategy was implemented as in 2013 a record number of rhinos were poached, with 1,004 rhinos poached in South Africa (see Fig. 4). This process of poisoning rhino horns is called