i have also had problems with the avent teats, although used them for my first baby, we now also use the tommee tippee closer to nature ones...

interesting about moving to 4 hourly feeds in order to increase the amount drunk, and increase naps... i have a cat napper, but he feeds pretty much 2-3 hourly during the day, drinks about 90ml to 120ml at most, but sometimes can be as little as 60ml on rare occassions.... at night however i do get a good run, and often get a good 5 or more hour block, on occassions 8! he is unsettled during the day and not sleeping much.... i wonder if i should try to stretch out his feeds during the day to see if he takes more, and then naps for longer? i sort of think i shouldn't mess with anything since the nights are so good. he is 2 months old by the way.... what does anyone think? i seem to get 2 half hour naps in during the day, then late afternoon can get maybe an hour or two nap in his vibrating chair, then he goes to sleep about 9pm.