Suggest Treatment For Green Stool In A Child

My dear well respected Docotor. My grandsom is 90 days old and he pass green stool.. Dear docotor itr is any bacterail problem.leas help us he has not breast feedi n and he is taking NAAN powder milk How to out his hearing effciiency. he never respnd to our calls or c lapping hands or making noise.. please help us by replying us..