Quoting twingals:" Thanks for your input! Ya, mine are only taking 3-5 oz per feed these days. They do 7 oz just before ... [snip!] ... the waste... although it does get expensive! They are on Nutramigen pre-mix so it is like $25 per day of formula. Oh well!!"
woah! mine are on similac sensitive, so it's more like $15 per day
for what it's worth, we've learnt to be v delicate in switching any part of their schedule. for starters, everything with them is always a phase, quickly reverts or develops into something else.
also, if anything does bother them (e.g., teething) sticking on schedule at least offers something steady for them in a changing world.
also, if you do change feeding schedule, there is a good chance sleeping schedule will also change. do you necessarily want that? kwim?
we also had a phase where they were eating a lot less, and so we had the same thought of moving to 3 times a day, our pedi said not to, to keep at four. she said it's just not done. that's not much a reason, i know!
lastly, maybe pre-pour a bunch of smaller bottles, and keep in fridge on hand? for example, make a coupla sets of 4-ouncers, and a coupla sets of 3-ounces, so that you can start w. the 4-ouncer, and quickly grab the pre-poured 3-ounce bottle if there seems to be interest?