Not sure if this is right to do but it worked for my dd at that age. I used to df at 10 and she would wake at 1am and again at 5:30ish (which would mess up her 7am feed) so I stopped the df and she started to wake at 11pm on her own, so I would feed her then, this caused her to stop her 1am wake and feed which then bumped her 5:30ish feed back to 4am. It eliminated the one feed and caused her to be hungrier for her 7am feed. Now at 4 months I've restarted the df at 10:30, she still wakes at 4am for a feed but that's normal for her age group.