Hi Jayne.
No advice about T1 from me, I know nothing! However, when it comes to how children express their feelings, I'd like to suggest something and forgive me if this is something you have already thought about.
My two children, now all grown up, and my grandchildren have gone through some horrid moments in their lives, the sort of things that as a parent and grandparent, I would happily die for, if it meant that my death spared them the pain, but I soon realised that by protecting them, I wasn't acknowledging how they felt. It IS unfair, it IS nasty, it IS upsetting and letting them express how they feel is by far, the best thing I can do for them, whilst sobbing with them.
We find ways of showing how we feel without being nasty to others; screaming into a pillow, making loud noises, sobbing until we fall asleep and most of all, dancing, singing, clapping and jumping when it all goes right. It was very difficult to hear my daughter screm at me 'I hate you' but she did it because she knew she was safe to say it, I wasn't going to abandon her for it. What we try very hard not to do is brush aside our feelings, they are important and very, very necessary.
wiflib