Since you asked readers for input at the end of Carrie Brogden's letter, I'll offer what I've observed over the 38 years that I've been a racing fan. First: look at how U.S. racing regards races for fillies and mares. The distances are shorter and purses are smaller. Getting a filly to the Kentucky Derby has become much harder ever since a points system was implemented. Plus, there's no Triple Crown equivalent for fillies. Every other top level racing country has Grade I classics for each gender... the U.S. has...