South American camelids kept as zoo or farm animals often display skin lesions, the aetiology of which remains unresolved. Mostly, only a few individuals in a herd are affected. The empirical treatment consists of oral doses of zinc (Zn), and lesions usually improve over two to three months. It is unclear whether the syndrome is a Zn deficiency or a disorder that responds to supra-physiological systemic Zn concentrations (Rosychuk,1994). Although it has been mentioned that males and animals of dark fleece colour might be more susceptible (Fowler, 1989; Rosychuk, 1994), no systematic evaluation of factors that predispose animals to the condition has been published.
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