作者: William J. Mergens , Benjamin Borenstein , Govind G. Untawale
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摘要: Poultry feed premixes and finished poultry feeds which contain particles comprising a Vitamin D 3 metabolite in weight ratio ranging from about 1:2.5 to 1:125 are described. These useful for promoting egg shell strength bone older laying hens as well provide such the usual benefits of diet. The invention also relates methods improving comprise administering particles.