My horse is a 13 year old gelding standardbred. I ride his brother as a pure trail horse only due to his more woah then go. I tried to take remington out one day and he could not walk. All he wanted to do was gallop away. He is the perfect horse on groud. I lead him and hes as calm as they come but the second i get on his back, all he wants to do is run the fastest he can. And hes quite the fast horse. All im wondering is what can i do for him to listen to me and cool down while were ridding. I want to start him on barrels but im not sure if he will have the attention span to listen to me. Ive tried lunging him before ridding but that doesnt help. Please send solutions.