With the number of equine fatalities during the current spring meeting at Churchill Downs now up to 12, officials at the Horseracing Integrity and Safety Authority (HISA) are convening an 'emergency veterinary summit' to be held Tuesday, May 30, in Kentucky. "HISA's highest priority is the safety and well-being of the horses and riders competing under its jurisdiction," a HISA statement released Monday begins. "We remain deeply concerned by the unusually high number of equine fatalities at Churchill Downs over the last several weeks. We continue to seek answers, and...