My DS is 9 months old and 11.5kg. We have 2 car seats; his original backwards facing maxicosi and a cheap forward facing britax which we use when going for short journeys in my DH's car. He fits well into both but looks more comfortable now in the britax as when he sleeps in the maxicosi he slumps forward and sometimes he makes horrible squeaky breathing noises.
I now have to do a 2 hour journey which we haven't done for a while. Which should I put him in for best safety and comfort?
Is it dangerous to sleep with their head slumped like that?
Thanks MN experts!