Hey ladies how many ounces is your 1 month old drinking? My 1 month old is drinking 4 to 5 ounces I breastfeed and supplement with formula. I took him to the doctors the other day he's 13 pounds and 6 ounces (he was 9 pound 8.9 ounces birth weight) the doctor told me he's over weight and to lessen the amount of ounces I give him. I tried that but he's still hungry after I give him 3oz.