Thank you for your query,
Your child is having gastroenteritis
The cause for diarrhea is mostly a virus.
The mainstay of treatment id to maintain hydration of the child.
Hydration cab be maintained by giving oral rehydration solutions like Pedialyte, coconut water, lemon water in amounts equal to the losses in loose stools. Give sip by sip.
Monitor hydration by activity, urine output, and skin turgor.
If any signs of dehydration
appears, try to give more pedialyte and consult your Pediatrician
and zinc will help to reduce the diarrhea.
The smell of stool is due to the infection.
Hope I have answered your query.