How much can a 1-month old eat in one sitting?
Our newborn is now one month old and is often times very fussy. We believe it might sometimes be because he is hungry, but we are wondering how much is too much feeding.
We are feeding only breastmilk (either directly from the breast or expressed). He tends to feed around 3-4h, with roughly 7 meals a day.
When he was around 2 weeks old he used to eat for around 25minutes from the breast (stopping on his own) or around 80ml from the bottle. Then he started getting more and more fussy, and we saw he kept making hunger signs after a meal (sticking tongue out, sucking noises), especially after bottle.
At 3-4 weeks we ended up already with around 40minutes for breasts and 120ml for the bottle. Now he still seems that often he gets fussy either as soon as we stop feeding or maybe 5-10 minutes later, and often associated with the sucking noises. We did try to weigh him a few times before and after breastfeeding to approximate how much he east at the breast (50-100ml per feeding). But with the bottle, even after 130ml he is sometimes still showing hunger.
Is there "too much"? And why is this only for the bottle? (We are using the smallest teat, the Premature from DR Brown, so he is not eating too fast, otherwise, he was gulping a lot).