Thanks, I didn't think it was hunger, for 2 reasons,...it was only 2.5-3 hours after his last feed, and if it was hunger he wouldn't have gone back to sleep for 4 more hours before waking again. Does that make sense?
I have never done a DF as when I tried it, it seemed to cause more night wakings.
I am working on extending his A time before his morning nap, but that is the one he seems to have most trouble extending.