Show supply of minerals needed by chickens chickens need minerals at all seasons of the year but it la Is of greater importance that they be supplied in winter than nt at any other season as tho the natural supply of minerals which may be picked up from the soll soil Is eu en lacking Allne minerals rals ore are more essential copoul to poultry than to other forms oilive of live stock as they not only use minerals to io aid in digesting thear food hue hut they enclose their product in a container made up mostly of minerals the mineral most needed Is calcium there are two common forms of calcium that can be easily utilized in feeding poultry calcium carbonate Is largely used in manufacturing tile the shells of eggs and this may be supplied in oyster shell ground limestone or pearl grits calcium phosphate Is largely used in the manufacture ot of bones and may bo be supplied through the use meal sharp grit in the nature naford of bif graval gravelis Is often of ten furnished to the oyster shell shelf ground it limestone nj estone and peirl pearl grits gilts to |