You can do all those other things, if you like: expensive supplements and therapies, scans and samples. But none of it will do the slightest good unless your horse can trust its weight to the soles of its four feet. Last September, veteran horseman G.W. Parrish was as usual scouting the later books at the Keeneland September sale for yearlings to pinhook through the small farm he operates at High Springs, Florida, along with wife Karen and daughter Kristin. In the Gainesway consignment, he came across a gray colt by...