Ok I've had this issue before but had to sell my first horse when I went off to college so I couldn't work on it.
I worked my 7yr old QH in the round pen last night and I've read things on this unbalanced cantering before. By worked I mean lungeing.
I've read that alot of practice in the round pen will help this issue. He picks up the right lead better, of course because most horses have their favorite direction. So therefore it was a tad slower than going left. When I asked him to canter for the first time going left he had to speed his trot up real fast and started to buck because he just couldn't seem to balance himself enough. I asked again and he did pick it up but he has to get this huge running start.
In order to help him be more balanced and slow him down what else can I do besides round pen work?
Just want to cover all bases. His jog is amazing, he can go any speed when it comes to trot/jog. I want to make sure he is sure footed at going fast so I don't have any accidents when we start practicing barrels.