are you breastfeeding or pumping?
She may be going through a growth spurt that is causing her to get up at night to eat. Babies sleep schedules change all the time so do their eating schedules you just have to roll with it. And one of the signs they say to look for when a baby is ready for solids is when they nurse more. The extra ounces at night might explain that. She's about that age. Our son is 5 months and we started him on bananas today. He loved them :) Maybe give that a try?
I recommend reading "The Sleepeasy Solution". It has sleep training method including weaning night feedings and avoid night wakings. It worked for my 5 month daughter.