I have been working with a horse in a round pen, free lunging AND on the line, and he is fantastic. Very attentive, picks up on cues the second I ask them, etc.
The two times I have tried to lunge him OUTSIDE the round pen, however, he has pulled pretty hard on the lunge when asked to move up a gait (trying to pull out, which he obviously can't do in a round pen).
He is ridden bitless and I prefer to not use a bit with him. Any suggestions on how to get him to not pull on the line? Seeing as a tug of war will end in me on the ground and him smug for it. :)