feeding - why is it taking so long?

He may be going through a growth spurt, our ped said this could happen at 3 weeks, 6 weeks, 3 months, 6 months, etc. or any time in between. During these your son may eat more or less and sleep more or less than normal. My daughter used to nurse FOREVER it seemed like, it would take over an hour for one session, and then you turn around and it's time to nurse again. I think you just have to remember that little babies are little people and sometimes they are really hungry, sometimes they only want a little, just like us adults do. My 4 month old goes through days when she wants to nurse constantly and fusses if I take her off, then the next day she will only nurse 20 - 30 minutes at a time and pop off a happy baby all smiling and cooing. Sometimes I have a difficult time getting her to stay latched on at first (she gets mad if the milk isn't instantly flowing) so I tried "juking" her up and down, patting her bottom, sometimes I have to stand up and sway (sometimes pretty fast) back and forth to get her going, then after a few minutes I can sit down and she will stay latched. Just work with him, try different things and see what he prefers. If he seems happy, he's wetting plenty of diapers, and he has no fever or stuff nose or vomiting or diarrhea, I would say not to worry, but you can always put a call in to the ped just in case. Good luck :)