I have been breast feeding my daughter for a month now and I've never had a let down "feeling".  We are having to supplement with expressed milk or formula after feedings because she lost quite a bit after delivery and is still not back to birth weight. Just curious if anyone else has not had that discernible let down sensation and if it means anything is wrong. I nurse her at her demand for as long as she wants, and then pump for 15-20 minutes after she is done.