ycbm
Overwhelmed
I think that reaction after a show is because they've "survived" and have just a bit more trust in you after it. The more things you can do together that build that sort of reaction, the better. Don't give up - I've thought about it many times with my poor chap, but he has come right and continues to improve even after all these years.
I've always taken nervous horses out as soon as I had them loading reliably. I've found it usually has a calming effect. Almost as if you show them just how much world there is out there to get worried about, so they realise there's no point in sweating the small stuff at home.