K.S.
Yes and no, I think it really just depends. I've done both. I have a 3 month old and and I've let him sleep longer than 5 hrs w/o a bottle(the longest he's slept is 7 hrs) and sometimes when he's sleeping, I just put a bottle in his mouth w/o picking him up and he'll eat it w/o waking up. I think it just depends on how much they've eaten through out the day.