Im a FTM and confused as to how many oz my LO should be eating. He is 4 weeks old, eats every 2-3 hours, and I EP so it is breastmilk but from a bottle. He has been eating between 2-3 oz at a time. How do I know when he needs more Im just worried he's not getting enough? I know w formula it is different and when nursing you wouldn't know the oz anyway...but I guess Im just wondering if I should put more in each bottle? He seems content after each feeding but just curious on when I should increase?