My 20 pound, 4 1/2 month old is exclusively breast fed. Has had the odd expresed bottle and the odd formula bottle. DP gave him formula twice this week - once on Friday at 7pm and once on Wednesday for his dream feed. Both times he demanded a second bottle and ended up eating 12 oz. There is NO way I give him this much from my boobs (I managed to express 6 oz so I guess he normally has about 8.) Is this too much? He has 5 feeds a day. Not weaned yet. No plans to as he is still sleeping through.