I have always seen babies fed with formula are bigger than exclusively bf babies. Although healthy and active bf babies sometimes are not as big (atleast to look at). My baby girl was 7.7 lbs at birth and at 6 weeks now is 9.6 lbs. Our ped says she is in the 50th percentile on weight gain and 75th percentile on height gain. I am worried about her weight gain. should i supplement???? or is she doing well beingh healthy and active and i dont have to worry about sizes anymore?????