Jo: Unfortunately Jo, Dash isn't vomitting anymore because of the Zantac and Gaviscon (wish his stomach was maturing)....without it he can vomit across the room and out his nose and it disturbs his feeding. As for waking Caleb at 4.30 - he will wake if he is hungry, so don't worry, obviously he is quite content. DD was sleeping 12 hour blocks at 5 weeks but she would wake earlier if hungry....when she slept through like this though she would have two bottles closer together first thing in the morning or catch up somewhere else during the day. Dash is starting to do this now too. It is around about this time that they drop a bottle anyway (when bottle feeding exculsively) Hope that helps, you are doing a great job.