A preliminary study of copper supplementation in alpacas (Lama pacos).

Supplementing three alpacas with Cu as cupric sulphate (10 mg Cu/kg liveweight) as a single oral dose resulted in no change in the mean plasma Cu concentrations over 30 days while a single oral dose of cupric oxide needles (2.5 g) given to three alpacas caused a small but significant increase in the mean plasma Cu concentrations during days 10-30 following treatment. The mean plasma Cu concentrations of four untreated animals ranged from 4.2 to 5.9 micromol/l over the study. The Cu as cupric sulphate was excreted in the faeces within 5 days while the cupric oxide needles significantly elevated the faecal excretion for over 30 days.