Okay I really do not think I am underfeeding but can someone tell me how much is appropriate when feeding babies everyday? I am not seeing a bulge.

I am probably feeding them 4-6 pieces that are roughly one third to maybe half the size of their head on average (if that makes sense) but honestly it is hard to tell, pieces are usually as wide as their mouth so they don't have to struggle to much.

Can anyone give me an estimate based on the baby head size? It is hard to tell especially because frozen pinky pieces look bigger than when it is thawed. I don't think I am underfeeding, they seem to be growing fine, but some days they also seem hungry and hunting all day (one in particular) so I wonder if maybe he didn't eat enough?