Thank you for your query.
Do not panic.
Probably she is having viral diarrhea
Avoid milk,fruits,juices and wheat products for the time being.
Give him pro-biotic syrup, zinc and ORS.
Take her to a doctor if she has dehydration
,blood in stool
, increasing lethargy
or decreased urination.
Consult your doctor if the problem persists.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.