I am having the same problem.
My dd is 4.5 months old and started waking through the night after previously sleeping through. I started doing a DF 6 oz. but she would still wake at least once a night. During the day she drinks four 8oz bottles plus the DF, that's 38 ozs.
That's alot for her age. And she still will wake and if I give it to her she would take at least 6 ozs. through the night. She takes in so much during the day that I can't imagine that she is still hungry through the night.
Last night I did a DF at 10:30pm and she still got up at 1am and 4am.
It took me 10 mins of PU/PD to get her back to sleep at 1am but then I feed her 5oz. at 4am. and then she got up at 6:30am. She normally would get up at 7am but I figured why try to get her back to sleep now. I don't know what her issue is? I think I am going to drop the DF, I don't know if her stomach is too full and this is waking her up through the night? She previously slept through the night w/o the DF. Who knows
I definitely can not figure her out.
Her reflux is slightly flared up (fussing/crying during feedings) right now so this could have something to do with it. She is such a good napper, I am not sure what else I could try?