THE easiest way to teach the horse to move off the leg is simply to work it in hand (even in a halter). Start to flex the horse to the inside, and touch right behind where the girth would be (you can use your finger, or a whip). Ask for bend, touch, bend, touch (a kind of large turn on the forehand). The horse starts to understand what an aid is.
The easiest way to teach leg yield (LY) ridden is head to the wall. Flex the horse into the wall, PULSE with the inside leg (the one closest to the wall).
As you teach the horse to move off the inside leg you must NOT try to steer it too the wall with the outside hand (this is what I usually see as the CAUSE of the counter flexion or bend which creates the horse falling in in the first place). If you ride a large circle try to spiral to the open side (ie start at A and spiral gradually to C through asking en/large on the OPEN side (the C side of the circle). This does two things: it puts the horse into the outside rein, but it also allows the horse to move side ways WITH bend (vs plain ly or head to the wall ly both are much straighter). Remember EVERY corner is three bended strides, three chances to have reaction to inside leg. Perhaps you need a little opening INSIDE rein before the corner to keep the contact (and perhaps noting to yourself that the outside rein is closed to the withers).
This has nothing to do with moods, but how you set her up.
For SURE, lifting the inside rein WILL help is sustaining inside flexion and preventing counter flexion, do that and THEN touch with the (inside) leg (but likely you are using an opening outside rein whether you realize it or not).
Last edited by equitate; 03-25-2013 at 12:21 PM.