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Abstract
Extract
Sir;ndash;Copper deficiency of ruminants in New Zealand is recognized in many areas. The means of correcting it are available but the problem is to be able to assess when therapy is required. Overdosage is wasteful and the results may be disastrous. Sheep, because of their less efficient excretory mechanism are more vulnerable than cattle to the effects of copper overdosage. The toxic effects of excessive copper intake are potentiated by stress. The following clinical report describes the effects of copper overdosage and stress in a mob of sheep.