Some experienced lesson horses are better teachers than even the human trainers.i don't think so, he's been a lesson horses for years and the instructor/trainr said he's just like that sometimes, especially when you first start cantering in the lesson
They totally know what you want them to do, and are perfectly capable of doing it, but they wait for you to be balanced and give a completely correct aid before they will do it. Experienced lesson horses are worth their weight in gold.
