My daughter is 7 weeks old and during her night feedings (usually 1 am and 5 am after going down at 8pm ) she nurses 7 min then falls asleep. I try to wake her to take more but that's all she will do. I know they get more efficient, but is 7 min really enough time now? After thr 5am feed she will usually sleep another 3.5 - 4 hours so I am assuming she is satisfied, but her poops are green in the mornings then so I dont think shes getting the hindmilk. Should I be worried?