Several lambs appeared lethargic and anemic. Sheep are unique in that they accumulate copper in the liver more readily than other farm animals. Mature ewes of British breed origin appear to be the most vulnerable and there is evidence to suggest that Finn Sheep and Texels also have a tendency to accumulate more Cu in the liver than other breeds.
Copper is essential for life.
It is required for normal iron metabolism, synthesis of elastin and collagen, melanin production and integrity of the central nervous system. More recently, it has been shown that copper is one of the key trace minerals required for an effective immune response. Signs of deficiency include anemia, brittle or fragile bones, loss of hair or wool pigmentation and poor wool growth. Toxicity can occur at levels above 25 ppm. If Mo intakes exceed 10 ppm, Cu deficiency may occur on diets that would normally be adequate.