Hello doctor.. My son is 15 months old..He was on formula milk till 1 year of age..After that we introduced full cream amul milk..Since then, his stomach is not fine..He poops after every milk feed..The poop is pale yellow in color..So we have again introduced formula and we have stopped full cream milk..Now he poops twice a day or sometimes he doesn't poop at all..my queries for this situation are: 1. Do we need to go for his stool test? 2. Is his stomach normal now? 3. Does this mean, he was not able to digest full cream milk?