The susceptibility of suckling lambs to zinc toxicity

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Abstract
1.Suckling lambs maintained for 4 weeks on a milk-substitute diet containing 407 g Toprina yeast/kg dry matter of diet exhibited poor growth, low appetite and extensive renal damage. 2.The batch of yeast used contained 2065 mg zinc/kg. 3.The kidneys of lambs offered a milk diet supplemented with the same Zn content as the yeast-fed diet (32.1 mg Zn/1000 kJ) were similarly affected.