I agree with the others, hunt him more thru the week. Don't run him just during season. I know here, we can run our dogs all year. You don't have to shoot out a coon every time your dog trees. If he isn't confident, he is going to 2nd guess himself. Make sure that you aren't being too loose with the shock collar. Some people use it more than they really need it and it can cause your dog to stop doing what it is supposed to be doing. Make sure he is really running trash be fore you juice him. Sometimes hunting him with another good hound can help to boost his hunt.