this question is on my 3 week old granddaaughter! For the past week she has had a total of maybe 4-5 bm''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s! When she does have them, it is with the help of an infant supository! her regular pediaretion or the nurse on call said to give her soy formula! She has been on similac advance wth iron since the day she was born, why all of a sudden would this effect her bm''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s? she does not seem to be having any problems by not having bm''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''s on a regular basis. Just would like to know if switching formulas is the answer! I am hoping you an shed some light on this! She has no problem burping with the advance with iron, but the soy she doesn''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''t like to burp! any suggsetions would be a big help! Thank You fo your time!