NEWMARKET, UK—We know that these breeze-up consignors have nerves of steel: otherwise they simply couldn't do the job. As such, the bloodstock industry could not have appointed a better echelon to test the stormy waters of the last couple of years, when they were first to be broadsided by the pandemic and then tried to put things back on an even keel last year. The opening session of the opening sale of the European circuit, then, gave them a chance to put their world back on its axis—even as they...