Apologies if this is a regular topic. DD is 21 months and a good sleeper, still in cotbed. DS is 3 months, in a cot in our room, still waking lots (BF). At some point we plan for them to share a room and we were hoping to try this when DS got to 6 months-ish. So a little while off but trying to think ahead. Obviously there is the potential to upset DDs sleep which we want to avoid but we're going to have to do it at some point. Anyone have any experiences or tips they can share ? Do people think they would they be too young at 6 months and 2 years? Thanks.