My baby's birth weight was 3.2 kg and gained 400 gm on the first month. Now he is 4.3 kg. he has gained 700 gm with in 20 days. I m feeding him both formula(60%) and breast milk(40%). I m giving him 22 to 25 ounce. I have read baby's weight in pounds * 2.5 =should be the feeding amount in ounce.(9 pounds*2.5=22.5 ounce ) But i m not sure. Please tell me am i following the right guideline? Please share ur feeding experience and the results u have seen.