I have been cosleeping since my LO was born. He is now almost 8 months and he would sleep great through the night from 6-7pm til 6-7am. But lately he has been waking up around 2am or 4am and then again at 6-7am. When he wakes up in the middle of the night I change his diaper and give him a bottle and he's out again. But why all of a sudden he is waking up in the middle of the night? Has this happened to anyone else?