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One might try looking at the various registries’ inspection results. One would hope that the judges could, with some reliability, pick the young horses with the greatest potential for success. Each year the KWPN-NA puts out a Stallion Directory/Handbook. It lists the keuring winners as well as horses that have completed the performance test or have received awards for sport. It’s an interesting and informative read, seeing which stallions are producing the horses that are performing well.
www.facebook.com/HiltonHallSporthorses[/QUOTE]
But inspection success, performance test success, young horse success, etc., does not always translate to success AT HIGH LEVELS - which was the OP’s question.
Many breeders have produced really good quality youngsters - and the overall quality of foal crops has been steadily rising for the past decade (at least, according to officials from the major registries). I think we are edging closer to seeing many more American bred horses in the GP ring, and maybe some of them will get to the absolute HIGHEST level of the sport - i.e., international success.
The problem - as always - is that most breeders sell their youngsters as soon as possible, and they can’t always guarantee the horse is going to get into a program that can properly develop a young horse through the levels. The careers of many a promising youngster has been stymied by lack of skill, lack of experience, lack of talent, and/or lack of money on the part of the trainers and owners. And that is going to be a tough equation to solve.