A few years ago I received a free copy of "Masters of Equitation on Canter" , compiled by Martin Diggle, when I ordered some books and DVDs from the USDF website. It is a slender little volume, but I found many things to like about it. In the "Compiler's Note", Diggle explained that he endeavored to provide a input from various masters of dressage from different countries and different time periods, as well as from "different schools of equestrian thought". That last phrase in the sentence may sound simple enough, but if a student of dressage, or of horse training in general begins to explore, it becomes apparent that some of the masters of old (and current masters I'm sure), sometimes had/have very harsh criticism of one another.
The book asserts that there are basically two beliefs regarding the introduction of the canter under saddle. The masters of old maintained that this should happen relatively late in the training of the horse, which would result in high quality initial canter work. In more recent times, the prevailing thought is that the canter under saddle should be allowed when the horse offers it, but using discretion. The book goes into some detail about how and why these theories developed. Gustav Steinbrecht, an advocate of waiting until later, explained that a novice horse will frequently adopt an incorrect three beat trot, then "falls" into canter.
The book also offers some specific training tips. Alois Podhajsky, quoted in the book, recommends that the first canter departs be asked for in a corner. If the depart doesn't happen or the wrong lead is offered, ask again in the next corner.
I found the book interesting, informative, and easy to follow, with information gleaned from many highly respected trainers.
It is so interesting to read about opposing ideas, is it not? Thank you for sharing!