EBF DD2 until 16 weeks, then introduced a bottle of formula at bedtime so that DH could sometimes do bedtime and I could do DD1's bath and bed (she's only 18 months and missing me). DD2 still wakes for 2 night feeds which are BF. I'm intending to continue BFing for the rest of the time until DD2 is at least a year old.
Now I've been reading some general info about how just one bottle of formula reduces the beneficial gut flora and seems to have posisble negative implications for supply later on.
What do you think? Is one ff in 24 hours after 4 months of BF really that bad? Bad enough to faff around with expressing instead?