When copper becomes toxic
A sheep farm was visited where copper (Cu) toxicity was suspected. Several lambs appeared lethargic and anaemic. The farmer had purchased lambs from a farm that had been feeding poultry litter (manure is usually treated with copper sulphate to reduce the bacterial level). Sheep are unique in that they accumulate copper in the liver more readily than other farm animals. As a result, they are very susceptible to copper (Cu) toxicity (poisoning).