Hi there Mandi, even if they once slept through, it doesn't mean they continue to do so. Unfortunately there are just too many variables in the first 12 mths that can interfere with sleeping in the night. At 6 mths there is a huge growth spurt so it's not uncommon for BF babes to eat a lot more at night. What does your day look like? Has he started solids yet? Are you medicating for the teething aspect?