Thanks for the query
There are so many causes of foul smelling stool. Even in normal child foul smelling stool may be present. You have to look for color of stool, change in diet (increase dairy product or protein content in diet) , any difficulty in flushing
the stool etc. Increased anaerobic bacterial content in gut also causes foul smelling stool. So I would suggest you to go for stool examination routine microscopy, stool for occult blood, fat content and bacteria, ova and cyst
. It will rule out any abnormality and need for any medicine.
I hope this answers your query effectively