Thanks for your query.
I understand your concern.
Your child is having diarrhea
which is mostly viral in nature but could be bacterial or protozoal also.
Loss of appetite is part of ongoing illness.
Most important is to maintain hydration.Give oral rehydration solution sip by sip after each loose stool
,give coconut water,buttermilk,curd,boiled potato,mashed banana.
Do not force her to eat.
Give lactobaccilus sachet and zinc for 14 days .
Watch for any features of dehydration
like decreased urine output/lethargy/increased thirst and in case you observe any get her re evaluated by pediatrician
for further management.
Wishing your child good health.