im getting my 10 wk old on a 3 hor schedual and i put him down at 8 pm and he usually wakes between 6:30 - 7:30 in the morning although im trying to get him to sleep till 8 in the morning.
if hes taking a full feed at night, feed him, hes hungry. try to add some oz to the day feed and sbtract from the night feed to get him to sleep through the night if you can. if hes not hungry, then its habitual waking, and you need to put him back to sleep with the aid of a pacifire, or at least half feed on bottle, then pacifire. the next night just pacifire, and the next he will prob. shuffle in his sleep or wake and drift off again. may need pacifire... may not. eventually he may sleep through.