PURPOSE: To produce the titled egg containing vitamin E and having high qual ity, in high efficiency, by feeding a hen with a specific granular tuff and dried powder of soybean cake such as bean curd refuse effective to stimulate the appetite and suppress the stress of a hen.

CONSTITUTION: Tuff having green color, etc. is crushed to 70W90 mesh, and heated in a rotary kiln at 575W630°C for about 30min to effect the complete elimination of the inner water of crystallization (+H2O) and obtain granular tuff. Separately, soybean cake such as bean curd refuse is dried with a high- speed drier to a water-content of 7W10% to obtain powder of about 150 mesh. A hen is fed with a mixture of 7pts.wt. of the above granular tuff and 3pts.wt. of the soybean cake, etc.