Your baby could be having UTI get Urine RM from good lab

Urine output depends on fluid intake. If not accompanied by any other symptoms like fever or discomfort during urination,probably you are overfeeding the baby. At this age,give 1 solid meal including curd and Banana in the diet and 5 milk feeds including one top formula feed using a spoon and katori. Maintain strict hygiene in preparation and giving of top milk feeds.