If this bowel abnormality is not associated with fever or any other symptoms, then there is no need of antibiotic.
Get a stool routine, microscopy and for reducing sugar done.
Give him Zinc Syp and probiotics.
Maintain hydration by giving ORS and breast feeding.
Maintain hygiene as it is common to put objects or finger in mouth in this age group.
Intermittent green stool
may be normal if there is no associated symptom.
Be watchful for danger signs like blood in stool
, decreased oral intake, lethargy
or decraesed urine frequency.
By taking these measures bowel pattern will be normal after few days.