The very first horse I ever owned (32 years ago now) was nearly unbeatable in a trail class..he was very level headed and took anything new well in stride. I remember our very first trail class...one of the obstacles was a piece of plywood painted white with a black circle in the middle. We were the last in the class to go and the only english pair (open class both western and english allowed). Every horse in front of us refused to go over that board. My horse, the little devil, put one foot on the board, dropped his head, sniffed at the circle, picked up his head again and calmly walked over it.
That particular horse was a Morgan/Welsh cross.