Oh and PS - usual amount required is baby's weight in kilos x 180mls per day... divide by number of feeds per day and this is how much to give each feed... ie Luke weighs 5.6 kilos, multiply that by 180mls is (goodness me need to get better at maths) 1008mls and divide by 7 feeds (if this is how many he's having per day) is about 145mls/feed.

It will probably depend though on when your test is... especially as he's not feeding overnight, if you feed him right up to your test, then you possibly might not need as much - only a few feeds in the afternoon/evening, and then again in the morning.

Mind you, this again is all averages.... perhaps he drinks more in the morning than the afternoon... etc etc... ring me if you need to honey!