In the absence of a serious or chronic medical condition,the ONLY factor involved in good growth is the DIET. At this age,give 2 solid meals a day including curd and Banana in the diet in addition to whatever you prepare at home and 4 milk feeds including one top formula feed and rest breastfeeds. Regularity and hygiene in feeds are of prime importance. Baby's weight should be double of birth weight at five months of age and three times at one year.