As everyone has said, if she is in the 90th percentile, you're doing great! If you are ever worried if your baby is getting enough to eat/drink, look at how many times a day they are urinating/pooping. If it is 8 times or more, you're doing fine. When somebody asks how much she is eating, just say 'obviously enough, because she is growing like a weed'! Babies know when they have had enough food for them, and they automatically stop eating at that point. The 'standards' are a range, and you have to take into account that there will always be those outside of th erange. When I was breastfeeding my children, I never had any idea how much they were eating, so we had to go by their growth, if they seemed satisfied, and how many diaper changes per day.