ds2 has just turned 6 months but is really big - long and wide. It is getting to be quite a squash getting him into his current stage 0 seat and he seems uncomfortable in it now. But is it OK to move him into ds1's seat (forward facing, ds1 went into it at about 11 months). Ds1 is now 3.5 and prob ready to move into the next one up whatever that is.
I am just worried about whether ds2's head control etc will be sufficient at this age to make it safe to move him.
So what are you supposed to do with super-sized offspring?