Thank you for your query,
You can give probiotic
or sacharomyces with your Peidatrician advise.
Continue to give oral rehydrating solutions like Pedialyte to prevent dehydration
Stool to be given for routine examination and for culture and sensitivity to look for any bacterial infection as this will require antibiotic therapy.
Monitor hydration by urine output, activity and skin turgor and if any signs of dehydrations are there consult your Pediatrician
Hope I have answered your query.