Show Oyster Shells Limestone Needed in Poultry House Nature atUl not having equipped bIr birds s with Ith teeth with which to grind theIr food thus this process of mastication Is ac- ac accomplished accomplished In the gizzard by muscular action Hard sharp grit Is used to grInd the food into small particles the 1 he harder and sharper harper it t is s the better and It should be before the birds at atan atall an all times If It Is soluble and contaIns carbonate carbonato of lime It Is s all the more valuable Grit can be easily tested for lime carbonate content and Its sol by putting some of It In a cup and fillIng the cup n with Ith vinegar acetic aCId If It is s a lime carbonate grit bubbles wIll rIse and a slight hissing nOise n will be heard This means that the gastric juices which are acId but not so much so as vinegar will have some effect on the grit and that lime will Ill be a available for the food of the bird Lime Is of great Importance es especially In feeding laing la Ing hens as the shell of an egg is s composed almost en entirely ot of lIme GraIns are rather de- de de- de deficient In thIs material and If bIrds are It Is very essential to supply It in n the form of o oyster ster shells lIme lIme- lImestone limestone stone grit or ground bone |