I am training my best friends horse for her since she know's nothing about horses. She has a 4 year old Thoroughbred Frieberger cross. He is very well mannered and mostly lazy. I was taught to use natural horsemanship and many tools from pat Parelli. Her horse is Very scared of the carrot stick or lunge whip. He doesn't lunge on line very well, and if he does he just shakes his head and doesn't want to go, then he takes off with his outside shoulder and runs. My friend has many times let him go, which I have repeatily told her not to do that. He has a great personality, but no respect. What should I do to stop this running off and shaking his head? I am going to try using a bridle while lunging and I have not used a nose chain before. Please help!