Face it, barrel racing can be a little boring to a horse due to how repetitious it is. One turn one way, two the other. Try mixing it up for him, take him out of the arena, practice turns around bushes and trees. If you have access to cattle, let him push cattle around. It helps teach rate and turn while giving them something to focus on. My horse can be super lazy loping circles but you put him on cattle and he gets a lot more spark.
I had a quick job riding a few barrel horses and I found riding them somewhere else and giving them something else to do renewed their intrest in their job. There is a race track down the road and I would take them down there and breeze them and "straighten" them out a little..they loved it. Posted via Mobile Device