At 4mo there's a huge growth spurt so even if the LO has previously STTN (ie 5 hrs), they start waking at night to feed again.
If FF we recommend during the day that if they are draining their bottles, to add another oz or two in. If BF, it's a case of going with it until your supply increases to meet demand.
We expect FF bubbas to STTN with one feed (or DF) around 6odd mo. Bf LO's can still have one or two Nf's until solids are firmly established at around 7-8mo. But it does depend on the individual LO so this is not set in stone at all ok?
For NW's I would try and resettle without feeding if it's been less than 3hrs since the last feed, otherwise I'd feed at this age do the growth spurt. Hth xx
When can I stop feeding at night?