Thanks for posting,
Your daughter is suffering from non-febrile gastroenteritis
which could be as a result of bacterial, fungal, viral, parasitic, protozoal infection
etc. Already having the diarrhea for more than a week means the situation should be considered serious as risk of dehydration and/or electrolyte imbalance
is a possible resulting complication. You start first by re-hydrating the baby with oral rehydration solution/salt to prevent dehydration and electrolyte disorder. After beginning the re-hydration, do consult a pediatrician
as soon as possible, a stool exams +/-culture could be done to determine the cause so that effective treatment can be provided. Effective treatment may include antibiotics, antifungal, antiparasitic
As soon as the cause is found, treatment will follow.
On your side just make sure the baby is properly re-hydrated.
Also make sure that the baby is not intolerant to the current food as that might be responsible for the loose motions.
Hope this helps