Just give ors and fluids frequently. Maintain adequate hydration .give zinc drops 1ml once daily for 14days.

At this age,give 3 milk feeds including one top formula feed using a spoon and katori and 3 solid meals including curd and Banana in the diet. Add ors after every loose motion if watery and give Enterogermina vial half vial twice a day for 5 days. If not improving in 3 days OR accompanied by other symptoms like vomiting or fever or dullness and refusal to feed,consult your paediatrician or me here.