Jerry, I\'ve been around since before the days of the Most Wondrous Oscar Barrera, so no, I don\'t think a fat guy working a horse would move them up 10 lengths. Might give them swayback though.
No, a trainer using is not going to tell the owner, unless they are needing to know for betting purposes. I\'m sure certain barns regularly tell their \'gambling\' owners when the horse is on or off.
I know very little of Jones, but most of the book rings true, if a bit self serving.