wow i think we have the same dr!! my lo has had weight issues from day 4 (hes 7wks now) and even though i have almost 7YEARS of BF experience the stupid dr got to me Im POSITIVE they were a MAJOR cause of my low supply problem ( which inturn caused my lo's weight loss/slow weight gain. He is still gettin supps but not for much longer. I TOTALY agree with all the others here. My suggestion is to read up on the problems formula can cause and email DR NEWMAN im sure somehere can help you with that link (im not so good with that stuff) Im no expert but from what I do know wet diapers, growing in lenghth, and the motor skills should be a BIG factor NOT just weight. Hang in there