RD, could you explain it better, please? I mean HOW you do it easy? I have a feeling they just don't understand and even though I bring them back to trot and try again they don't get it.
Kevin already answered it. I always teach side passing right from the beginning so my guys side pass freely before teaching leads. If
I want a left lead I use my right leg to ask for the lead. If I want a right lead I use my left leg,
So back to asking for the left lead.
My left leg is on the girth, my right leg is behind the girth asking for the horse to move his hind quarters to the left or to the inside of the circle. I
keep his front end where is it and tilt his head to the outside or right in this case and with the same left leg that is back behind the girth I bump him with that leg, kiss to him and he pushes off of the hind end into the left lead.
The left lead is leading so to speak with the hind end crabbed to the left or inside of the circle, the front is crabbed to the outside burying his right side.
If you want to see how this feels pretend you are the horse. Crab your body or shoulders the same as I asked the horse to and punch out with your left arm, then punch out with the right. See how difficult it is to punch in the direction you want to go with the right arm??? It is uncomfortable with anything but the left. I do it the same as Kevin I only ask for a lope from a stand still or walk, never a trot for other reasons.
I don't work in arena, only open spaces and if you do leads in a certain area he is anticipating the lope. This helps and from a stand still all I need to do is touch one flank or the other and he is already in the lope mode and with just this simple cue he quickly learns to swing his butt in the disired direction and lope off from the hind end.