We're trialing a new system with DS1 (4 wks) where baby stays put in one room (spare room) all night, and DH and I swop beds between master bedroom and spare room depending on who is doing the next bottle feed. Thing is, baby's room, which we thought he wouldn't move in to until summer, is directly off the spare room - no landing or anything. If the door between the two rooms is open, is there any reason not to put baby straight into his cotbed at 4 wks?! Otherwise we will move his next2me into the spare room.