Show insoluble grit aids chickens digestion some insoluble grit usually gran ite or river gravel will be eaten by hens it if it is available it assists the gizzard la in grinding grains and coarse feeds that might cause im of the digestive tract fine ground feed cap can be digested satisfactorily facto rily without grit being available oyster shell and limestone rock particles sometimes are used as grit but the digestive juices break these down rapidly and thus make an excess of calcium available grit commonly is kept bafo before re hens at ill all times although some producers prefer to teed feed W icat at intervals of 10 days to two weeks |