I worked pretty hard at weaning my 11 month old off night feedings for the last couple of months. But, if she's very tiny that may not be an option. On the other hand, you could try it and see if she starts eating more during the day. You have to be really dedicated to making this work because it takes more time than just feeding. The up side is, it works eventually (maybe took 1-2 months for us, but some only a few nights).
A few tricks...
You could try to just cut out one feeding. Once she has done that pretty successfully and is not waking anymore, try to eliminate another. When she wakes, go to her comfort her, lay her down, tell her to, "go to sleep" (this will become a que for her, "oh, it's not time to get up/eat, we're going to sleep" . Let her cry a bit, and go back to ley her back down/comfort (or, if you're comfortable you could just let her cry). Some things that were really important during night wakings for us were: baby stays in bed-- you can lay her back down, pat her, even sort of cuddle her (if you have to pick her up to calm her down and rock a bit, stay right by the crib and as soon as she settles down, back to bed); lights stay off; try to be calm and soothing yet firm; you may even want to lay down on the floor with a pillow to show her how we go to sleep. Remeber, send a clear message, "it is time to sleep". Sometimes it took 1 hour, but the time investment was worth the pay off! It was hard, but you have to be strong and make the decission not to feed her at this time. If you combine this with cluster feeding before bed, you might not feel so bad about refusing to feed her.
You could try not feeding her whenever she wakes up, and setting an alarm for you for feedings. This is a gentler way--she still gets fed, but learns that waking up does not equal eating; waking up equals going back to sleep. Sounds crazy, I know. But, once you have her used to going back to sleep when she wakes up and used to you initiating night feedings, you can move your feedings closer and closer together until you've eliminated one at a time. You just set your alarm for a time just before she usually wakes up. If she wakes up before or right about when you're going to feed her, tell her to go back to sleep, pat her back, leave her cry, and come back to sooth until she is asleep (or just go tell her to, "go back to sleep" and leave her cry, whichever you're comfortable with). Once she is asleep, you can feed her (remember, you are teaching her that wake up means go back to sleep NOT eat). I would gently take my baby out of bed, feed him and put him back. Most times, he didn't even wake, just sort of ate in his sleep. Like I said, once she is learning to wake less, you can start setting your alarm later and later; or you can start bringing your 2 middle of the night feedings closer and closer together until they are 1 feeding. I know, it sounds crazy and the nights you do it, you're waking more than if you were to just respond to her cries and feed. But you are trying to teach her a new way. Remember too that extended periods of sleep are good for her too. You are teaching her something that is important for the health of both of you. It is also a lifelong lesson--do really want a 3,4, or 5 year old that has learned to get up 3 times a night? Is that even healthy for your child?
The other thing that seemed to help my guy was cluster feeding in the evening and morning. You want to teach her to eat more during the day so she wont need it at night. So she won't take a big bottle? Offer her 4-5 ounces at 6, 8, and 9 or something like that. Then, in the morning offer her milk every hour or two for the first few hours of the morn. She might not get it right away, but after a while (and if you combine it with a method of taking away night feedings) she may start to get it.
Some say try giving less and less milk at the feedings or give water, but I didn't find this to work so well. It just pissed my guy off royally (and took him longer to go back to sleep). It worked better to send a very clear message, "go back to sleep" means we are sleeping and I am not going to feed you.
Hope this works. These are some things that worked for us. I breastfed and my baby was waking up 3-4 times per night starving to eat until at least 9 months. It's hard and often it seemed that just feeding him was easier than spending the time to teach him to sleep at night. But, last night--- to bed at 7, slept until 4:30 (ate) then slept until 6---yahoo!!! Even when he does toss and turn a bit, usually a gentle hand on the back and whispered, "go to sleep" are sufficient to send him back to dreamland in a matter of minutes. We're getting there :)
Best of luck!