My 8 week old boy is bf on about 5 long hour feeds throughout day and then on last 6th feed at around 10:30pm I'm just starting to give him formula - he was given expressed breastmilk up until now as his dad does this feed, but as I have very hungry baby I'm exhausted with often hour long feeds and expressing so have decided to change to formula last feed - he is drinking 7 ounces of formula each night and breast milk all day - he has always gained weight well and is on 75th centile - he seems to drink more than any other baby I know -I wondered if anyone out there also gave their 8 week old 7 ounces of either expressed or formula milk?