My son is currently six weeks old he's been eating fine up to now, he has had plenty of wet diapers and poopy diapers. But the last couple days he has seemed uninterested eating just wants to sleep. No fever not fussy or anything just tired. I'm just worried because even though he's always had plenty of wet diapers and such he's not always eating 16 - 24 ounces a day like they want. Has anyone elses 6 week old baby stop eating for a little while could he be going through a growth spurt.? Also should I be concerned that he's not getting what the charts say is a normal daily intake. He has been growing well so far and has all the wet, poopy diapers like they want.