I didn't expect to be here for a few years! There's been a lot of upheaval in DS1's life lately - DS2 was born very early so there's been 3 months where either me or DP has been at NICU, and now DS2 is home and being a newborn. On the whole I'm amazed at how well DS1 has done with it all, but certainly everything is escalating to a disaster for him in a way that's not usual for him. This is all expected and fine, and I'm happy handling his meltdowns when they're happening right in front of me.
However, he's started announcing that he's going to his room, slamming the living room door shut and then going upstairs where he takes everything out from under his bed and hides under it. We have a monitor, so I know that after a bit of time he starts playing with his toys, then if he hears us on the stairs gets back under the bed ready to scowl at us. I'm not entirely sure how to handle it! He is prone to a strop, even prior to DS2, but they were always very short and in the same room. I think taking yourself away from whatever is making you upset is a fair enough cooling down mechanism for a 4 year old, but I also don't want him to think he's being abandoned alone in his room and that no one cares because DS2 is here. At the moment we're giving him 5-10 minutes then going upstairs to see him and having a chat about whatever it was that set him off. We're not addressing the fact that in an ideal world he wouldn't be storming off and slamming doors over things like sliced chicken being put on the table for lunch when he doesn't like it, when there was plenty of other food he did like coming. However I'm not sure if this counts as rewarding attention seeking behaviour and so he'll continue to do it, and that we should actually leave him. DP is currently on shared parental leave so we're making sure he gets plenty of 1 on 1 time with us, although obviously it cannot be denied there is another child in the house receiving some attention!