We weaned several times....had to bring back overnight feeds cuz of travel, vacation, and general unrest with the routine. But each time we weaned, I used the dilution/reduction method. Offer less ounces to your LO in the bottle and dilute the amount. So if it's normally an 8oz bottle with 4 scoops, offer an 8oz bottle with 3 scoops. Then, I cut the amount, so you might offer 7 oz and instead of the normal 3.5 scoops use 2.5 scoops. Then after a couple of nights, reduce or dilute again. And again and again... Tracy says that your LO will shift those calories to the daytime and one night they just won't need them so they won't wake for them. If they are still waking, offer water. But this never worked for DD. We got down to 4oz and 1/2 scoop and it was too diluted she wouldn't take it. So, I kept the 4oz to 1 scoop ratio and then cut it to 2oz and 1/2 scoop but never used the 2oz. bottle.
I think that Tracy recommends 3 days between each dilution/reduction, but I went by my LO. If I could tell she was eating more of her breakfast bottle or more solids then I figured she'd adjusted those calories. Sometimes we stayed at a level for several days, sometimes just 2. Trust your instinct. You'll know when to tweak it again.
One other thing I finally did was just cold turkey stop giving the DF. DD didn't often wake for it, so we just waited for her to wake up and used the diluted/reduced bottle at that time. And then we would extend the other overnight wakeups until DD just wouldn't settle without that bottle, showing that she was clearly hungry. Don't know how this will work for you...I'm guessing you have 4 daytime bottles and the DF, so you might not want to go this route. We had other night wakings...
And, my DD really started sleeping better once she got on solids and we started giving her protein, starcy carbs and yogurt. She eats these at each meal and we also work fruits or veggies in and some finger foods as well. We're going to ramp up our sippy cup efforts so it should be a full circus soon! But that combo of protein, starch and yogurt at the core of every meal really seems to work well for my DD. Depending on what your giving for solids and when, you might be able to "tank up" with dinner and the bedtime bottle and just cut the DF cold turkey without a hiccup!
