At this age,give just 2 top milk feeds using a glass,stop bottle and breastfeeding,and give 4 solid meals a day including curds and bananas in the diet in addition to whatever you prepare at home. Add ors after every loose motion if watery and give enterogermina vials one vial twice a day for 5 days. If not improving or accompanied by other symptoms like vomiting or dullness and refusal to feed, consult your paediatrician for physical examination and treatment.