摘要: A high prevalence of metabolic disease was evident in a large flock sheep early the lambing season. Pregnancy toxemia and secondary hypocalcemia were diagnosed on basis history, physical examination findings, results serum biochemical analyses. To decrease costs to owner, pooled samples used determine health status flock. Ewes close time found be severe negative energy balance, which resulted excessive fat mobilization as well clinical signs associated with pregnancy hepatic lipidosis. By nutrient analysis, it determined that ewes had an inadequate amount fermentable carbohydrates, provide glucose support additional nutrition required during late gestation. The diet provided gestation should contain sufficient precursors maintain adequate availability maternal fetal tissues. minimize physiologic decline dry-matter intake (which accentuation balance), high-quality feed ingredients fed this period.