My son is 17 days old and had been eating 4oz bottles since he was born (he was 8.5) he now weighs…

My son is 17 days old and had been eating 4oz bottles since he was born (he was 8.5) he now weighs 9lbs and he's still hungry after a full bottle wtf? I give him a binki and he spits it out cause nothing is comin out