Rule of Thumb for wagering at Keeneland

Originally Posted by 2MinsToPost

Ditto. Well written and provided me with a whole new perspective.

Many horses like running on firm turf or firm dirt surfaces. Hence the term "hearing their feet rattle". Not every horse is as brave as others. When they run on footing that is unsure, they don't try their best.
Its why on soft turf courses that form changes and the races often get strung out with many stragglers in the rear obviously not trying(ahem, ahem, cough cough cough POLYTRACK!).