Hi,
Some babies just decide formular is not for them.I know its not recommended until 12 months but have you thought about switching her to full fat cows milk (blue top)?
You might find she gets on better with that. Its worth a try. Also as long as you make sure she is getting plenty of dairy eg yogurts chesse etc and has a healthy varied diet i wouldnt worry too much. If in doubt a trip to the hv might put your mind at ease.
I agree just switch to cows milk but do this gradually ie mixing half and half at first unless your daughter may be sick if this doesn't work you could just add nesquick milkshake to the bottle that did the trick with my daughter!!
all this depends on whether your little girl was early (premeture),, if she was you should ask your health visitor...
maybe try other varieties of formula
i wouldnt recommend crusha or nesquick as i dont think their ingredients are suitable for tiny tums.