Answering ur question, yes u can give food after zinc syrup and for tummy ache if persist ing, show to ur family pediatrician
Next Steps
Hygiene is must in handling all eatables. Maintaining adequate hydration, by giving ors, fluids is more important than other things.
If loose motions persist or vomiting starts plz visit ur nearest pediatrician.
Health Tips
1. proper hand washing, cleaning all eatables including fruits veggies are essential steps to prevent these infection
2. Avoid all types of junk foods, outside foods, improperly cooked foods.
3. Bottle feeding, unhygienic water supply also cause this issues.use boiled and cooled water whenever feasible