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The studies were performed on 28 calves aged 2—8 weeks. The calves were divided into 4 equal groups. The calves from group I received 500 mg of zinc in a water solution of ZnCl₂ orally, once a day, for 4 weeks; in group II — the same dose of Zn (ZnCl₂) and 2500 mg Mg in a water solution of MgCl₂ X 6H₂O; in group III — only 2500 mg Mg (MgCl₂ X 6H₂O). Group IV acted as the control one. The following...
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