Small vertebrate pests such as possums, rodents, mustelids and rabbits are routinely poisoned using toxins such as sodium monofluoroacetate (1080), brodifacoum, pindone, cholecalciferol, and cyanide. Feratox® is a pea-sized vinyl encapsulated cyanide capsule. It is intended to be more effective than cyanide paste and reduce the risk of exposure to hydrogen cyanide gas for the users. This report describes the rate of cyanide loss from Feratox® capsules in feed paste.