My 5.5 month old daughter started to do this thing where she drinks the whole bottle of what she needs while asleep, but when awake, she'll only take in a little bit. Has this happened to anyone and do you know why that is? could it be teething?
You should never put your baby to bed with a bottle of anything but water. Milk, juice, formula, ect will decay her teeth. If you don't believe me, ask her doctor. It is also a very bad habit to break. (Teeth do not need to be present yet to decay)