Thanks for your query.
The boy seems to have responded favourably.
Green colour of stool should not be the cause of concern.
Bile that is secreted in the first part of the small intestine
is actually green. As stool is digested and passed through the large intestine it changes into a darker brown color.
If stool is still green by the time it is excreted from the body, it just means that it went through the large intestine too fast to be changed to brown.
hope you feel relaxed now.