I've read that TH does not recommend getting rid of DF before 6-7 months until solids are firmly established, but unfortunately I don't have other insight to offer in your situation. The way I cut them out was over a 2 week period where every night I pulled the DF up 15-30 min and reduced the feed by 1 oz. Then I added that oz to the first meal of the next day, then the 2nd oz to the second meal of the day and so on. When I got down to 1 oz by 8:30pm I just didn't give it to her. It worked out really well! Good luck!