Re: Baby still hungry!!!???
Congrats on your new baby!
Milk is a demand-supply system. It is normal for new babies (among others) to want to nurse ALL. THE. TIME. in order to bring up your supply, especially when he's going through a grow spurt or something. So when you give a bottle, you are actually telling your body to make LESS milk. The name of the game is just settle in for a long couple days nursing, get a book or your computer, relax, and keep switching baby back and forth as long as he wants to nurse. The idea that supply has to "stock up" is kind of a myth: the way you make more milk is by removing milk.
Second, babies don't control the flow out of a bottle like they do from the breast, so the fact that he "scarfs" it down doesn't mean anythign about how hungry he is. He has to swallow to avoid choking.
Third, MANY babies - maybe all? - go through a phase that some books even have a name for - the "four week fussies" - almost always in the evening hours but maybe yours starts earlier in the day. They just fuss. Try changing the scenery, go for a walk, bounce, rock, nurse nurse nurse. It's a phase most of us have been through and it's distressing but it is completely normal and it will pass - in a few weeks.
You don't mention, so I'll just say: the best way to make sure you have enough supply and make sure that baby is getting enough is to nurse on demand, at earliest cues, around the clock. And look at his diaper output. Until 6 weeks, breastfed babies should have something like 3+ stools per day and at least 6 wet diapers. After 6 weeks, poops might decrease to as infrequently as weekly, but wets should stay at 6+/24 hours.
So my advice: stop giving bottles. Let baby nurse. When he's really fussy do something different to distract him. Good luck and hang in there!
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.