Saddle-- if you are asking what a bounce is by definition, it is a sub-par effort caused by a previous strenous one. If you are asking about when horses will bounce, it\'s complicated-- and while Andy Serling is a friend of mine, his comment on Pack\'s show, that anyone who believes in bounces is lazy, was moronic. Just using one example, Santana Strings went into the Amsterdam kicking down the barn, and ran his eyeballs out, running a new top. After which he lay down in his stall for a few days, and did not eat like he did before the big effort. He eventually perked up, and the King\'s Bishop was a GI, so we ran and hoped for the best. But sure enough, he didn\'t fire-- he bounced.
It\'s very complicated, and the Thoro-Patterns you can find on each sheet are an attempt to help figure it out. It\'s not simply a question of a horse reacting to his top, or to a new one-- other factors come into play, like age, pattern going into the big race, history off previous tops, severity of top, who the trainer is, time between races, etc.. Andy-- anyone who doesn\'t investigate bounce theory enough to understand it is lazy.