Ma’am I think the age should be 11/2 years daughter instead of 1.5 months .If that’s the case then your child is constipated. That is the reason for foul smelling stool .
Next Steps
Give her more fibre and fruits. Less of formula milk or full cream milk. Give her more toned milk with
sugar as sugar is a natural laxative
Health Tips
Deworm her with albendazole. Can even go for a laxative for few weeks