Originally Posted by Cherie
Proper flying lead changes require a high degree of skill and a very broke horse. You DO NOT want to change direction or put a lot of pressure on a horse on the outside as they will learn to change in front only and/or learn to resent lead changes and then refuse to change at all. The worst horses I have ever had to teach flying lead changes to were ones that people had fouled up trying to get them to change without collection and control -- particularly control of the horse's hind end.
It is not easy to teach this collection if you are not riding at that level. I have had it take quite a few lessons when the person and the horse was right in front of me, so I do not think an internet lesson is going to get it done. You are going to need feed-back and one on one instruction from a very good H/J, dressage, eventing or reining coach to put it together.
Teaching a collected lead change from a circle with reverse bend or from and counter canter get the most correct changes. Then, they can be moved to collected canter work on a straight line. Using a pole or a direction change teach a horse to change in front first and you just hope they catch up behind. Good hunter changes are just like good dressage to reining changes - they are back to front changes like everything else advanced that a horse is taught.
Just to reinforce this fantastic response.
There is a very good reason why flying changes are not introduced in a dressage test until quite a high level, once counter canter, simmple changes, collected trot/canter, half pass and half pirouettes have all been established. Because a correct flying change, in which the horse remains in collection and changes clean - not late behind, requires a great deal of balance, strength and co-ordination not only from the horse, but also from the rider.