So my new colt wont lunge in a circle unless its free lungeing, he doesnt react to anything when he's on the line. He just will not circle on a line. Is this just because he things its for leading around. I know how to lunge a horse on a line but he just wont. He will start and go for a few paces but stops and turns into me. Tryed everything to get him going but he will not. He's not that stubborn but I think he thinks im going to lead him away. Help?!