Ok so im confused and im sure i sound stupid but ive always heard a newborn wont drink if they are full. Well my 12 day old will literally lock his lips and gums and spit out his formula but then two seconds later he is drinking more and this goes on and on til he is asleep or i take the bottle. I googled and it says babies will eat even if not hungry because they have a sucking need? How do i know he is actually full? Again i know i sound stupid