At this age,give just 2 milk feeds using a glass or spoon and katori. Stop bottle feeding and breastfeeding if given. Give 4 solid meals including curd and Banana in the diet in addition to whatever you prepare at home. Give ors after every loose motion if watery and give Enterogermina vial one 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.