Show minerals for hens the lime needed by laying hens is cheaply and satisfactorily supplied in in crushed oyster shells A limestone grit may also be used as a source of this element milk and the meat scrap customarily made part of the poultry rations add other minerals and the addition of iron sulphur iodine etc as separate ingredients lacks demonstration of its necessity if nothing more while minerals are essential elements of a poultry ration they are found in the grains and supplements commonly fed as they are also in the grains and roughage of dairy feeds |