Thanks for your query.
Your child is having acute gastroenteritis
which is mostly viral in nature and settles in few days.
Greenish stools are not a matter of concern.
Most important is to maintain proper hydration.
Continue giving oral rehydration solution sip by sip after each loose stool
,give coconut water,lemonade.curd.boiled potato,banana,rice porridge,
Continue with probiotic.
Watch for features of dehydration
like decreased urine output/lethargy/increased thirst/decreased skin turgor and in case you find any get hi evaluated by pediatrician
Wishing your baby good health.