It’s interesting you say that - my guy has started shaking his head repeatedly while and after I bridle him. I’ve attributed it mostly to bugs - which is reasonable in the season and my climate! - but it’s a little suspicious. Luckily it doesn’t persist, but looking back and thinking more about it, many signs point to him being unhappy with his bridle, He’s just a very good natured horse, and while he never hesitates to express his feelings lol, he doesn’t get overly upset about much.
I just haven’t put all the clues together.
I am very tempted to try a Finnesse. Where did you get yours?