Studies on the Copper Requirement of Growing Chickens

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Abstract
Various levels of Copper supplementation were supplied to a basal milk-sucrose diet deficient in Cu but high in Fe to ascertain the minimal level of Cu required to maintain growth, erythropoiesis, and to prevent vascular rupture. A dietary Cu level of approximately 2.7 ppm failed to protect completely against vascular rupture. Growth and erythropoiesis in chickens receiving 2.7 ppm Cu were not significantly different from those in control birds fed a diet with a Cu content of approximately 8.7 ppm.