snnowy
initially when i didn't have enough ebm for her, i had to supplement, it wasn't a choice though i was ok with it. i ended up giving her the fm either if we're out or at night. i've heard people said it helps bb sleeps through the night and since i have to give her fm, we tot just do it at night. if it helps good, if it doesn't, no harm done. she did not sleep through the night when we give her fm for the last feed. it did stretch the in between feed by about an hour.
once i had enough ebm, she was on tbf and actually started sleeping through the night, so i doubt it was the fm that did it.