Kelly, When I say he doesn't feel 'full' I mean that I could feed him for 1 hr and a half straight, and he would still be hungry. I have only ever been able to feed my babies for 6 weeks- 3 months because my milk has never been strong enough to feed them for any longer. So even though I am feeding him on Breast milk, I top him up with a bottle. In the hospital he fed on both sides three or four times(I alternate breasts after I burp him!) and then he could still take 50 ml from the bottle.