Hi - My 6 week old just reached 9lbs 2oz and his birth weight was 8lbs 6oz. We've noticed since the beginning that he doesn't gain more than 3-4 oz a week. My lactation consultant has been having me use the SNS for the past 3 weeks plus pumping for 15minutes every time. (I never really get a lot when I pump -1/2 - 2 oz max) The first week on this system he gained 7 oz, but last week 3, and this week 4. He is a very happy baby and seems satisfied at each feeding. He does go a long time at night before waking up to feed (last night was the longest -8 hrs!!!!!). He's been going 6 hours at least since he was 2 weeks old. I've tried waking him up at night, but he doesn't eat very well because he's so sleepy. Normally he wakes up around 4 after putting him down at 10. Is letting him go so long at night depleting my milk supply? He doesn't seem especially fussy during the day like he's not eating enough. He's a pretty happy guy but why won't he gain more weight? Is it truely a problem? He is a tall and active guy, is his metabolism just high? Thanks for the advice!