My understanding on this from reading and speaking with an LC is this: once you heat the milk, if your baby doesn't consume all of it at that time, you should get rid of it, don't put it back in the fridge to reheat it to feed it to her later. So you should only heat it once. I know the feeling thinking about having to dump it when it is SO hard to keep up the supply for her to have enough! My only suggestion, as much of a pain as this will be, is if she takes between 4 & 5 ounces at a feeding, only heat up 4 oz., and if she still seems hungry, to heat up another ounce, that way if she doesn't want more than 4 oz you aren't wasting a whole ounce. I hope this helps!
