hi kate ,
wow , 2.5 scoops to make sure he dun wake up ? to be able to last 8hrs after last feed is good !!!! *envy u*
yesterday , we UP our son's intake to make sure he dun wake up , we gv him @ 1 am , he slept thru until 7am . but he was rolling all over the mattress ( wif his eyes closed ) , changing his sleeping positions thruout the nite . but he didnt cry , so we continue sleeping ...