https://iditarod.com/wp-content/uploads/2012/02/vetcheck.m4v Every dog that runs in the Iditarod Trail Sled Dog Race must pass extensive medical examinations. Blood work and ECG recordings are included in the exam process. All dogs have microchip implants for identification.  During the race, vets are along the trail at checkpoints to examine the dogs.  Keeping dogs healthy before, during, and …