EGGSHELL COLOR HOLDING AGENT AND FEED FOR LAYING HEN

摘要

PPROBLEM TO BE SOLVED: To obtain an eggshell color holding agent for preventing discoloration of an eggshell color with aging of a laying hen which lays brown eggs, and obtaining eggs having normal eggshells, and to provide feed for laying hens. PSOLUTION: The eggshell color holding agent contains an organic mineral compound comprising an organic zinc compound, an organic manganese compound and/or an organic copper compound, phytase and/or a viable microorganismic agent. The feed for laying hens is also provided. PCOPYRIGHT: (C)2005,JPO&NCIPI