That's funny, my little one, started with his night waking at 15 weeks.....it's driving me crazy. Is your LO napping OK?
We have been feeding Liam at the first waking and not the 2nd, as he goes straight to sleep at 4am. I wasn't feeding him also as I felt like you did that, he would get used to it, but I found if I didn't feed him he would keep waking.
Yesterday I started feeding Liam 1 TBSP of cereal and today the doctor told me to feed him 2 x per day as this may help him sleep....I fed him at 11am and 6.30pm with cereal. I'll let you know if it works.
My LO only takes approx. 27oz per day, he seems to get bored with the formula after a while.
Wendy