i'v successfully formula-fed millie recently, but i was surprised at how little milk she eats. i kno im giving her 3 meals a day, but when she's on my breast for 5-10 mins and im hearing lots of gulps, i estimated she was having about 200mls of milk. but with the bottle she seems to eat at just the same speed as she does on my breast, but when i check the level on the bottle only 50 or 100mls have gone! i told my boyf's SIL about this (whose 6-month-old twins are bottle-fed) and she said maybe i need bigger teats- hers are on size 4 now. well i didnt kno there were different size teats! i checked the box that the avent bottles i bought came in, and it says the teats are size 2 "slow". so maybe its that she cant get enough milk out thru it? but she seems to get plenty (i can see it dribbling down her chin) and anyway i thought breas-fed babies were used to working hard for their milk coz breasts arent as free-flowing as bottles do u think i should get bigger teats or is it just that she wont take that much milk now she has solids?