my bbay girl one year 2 month old..taking iron and multivitamin daily 5 ml each..my baby is constipated child and taking 20 ml stool softner daily morning evening.when my baby passes stool first she do minor hard stool is like minor brown type...yesterday she did not pass stool.today morning she passed stool and stool is black not whole stool black when she push stool..stool look black not whole stool in black colour..