He will throw his head around, and sometimes kick out. I don't mind when he gives a little head toss but kicking out and bucking like he's playing in his field could be dangerous for both me and my riding company. I want him to be mindful he's carrying a rider so he doesn't goof off too much, the last thing I want to do is beat up his playful spirit because he's such a character, I don't want to ruin that. I want him to know it's ok to have fun, quietly, but not get crazy.
What is a good way for me to teach him its not okay to do that? I don't want to be aggressive about it, but I want to make my point clear.