Is he eating a lot of solids now at each meal, Melissa?
Sometimes if they eat too much, they are too full in the day to bf as much as they need, and may wake at night needing to nurse instead. We never did the dream feed, so I can't offer an opinion there. And then at that age, Riley was often too much of a busybody during the day to feed well, and would wake at night instead to nurse. I *think* I read in the BW book that after a certain age the df can disrupt sleep, but I may have imagined that!
Is he feeding enthusiastically at night time when he wakes?