my baby is not gaining weight in 20s day he gains only 250 gm what should I do

A. That’s fine see approximately 500 g minimum child should gain in a month or 250 g in approximately 15 to 17 days is just fine there is nothing less as of now further if your child doesn’t maintain a minimum gain of 500 g then you can consult your doctor doctor if required on the side you can also start with two or three feeds of formula