Fun Fact: Most of Iditarod is run by volunteers. (All of these vets are volunteers, pilots to deliver food & return dogs, people to helps with the race & track information)
Mark was a handler who was helping to check in 20 dogs for his musher. He really helped explain the race. He prefers sprint races because he likes the speed (where the dogs go 20 miles per hour) & sleeping in his own bed instead of on the trail.
The vets were checking the dogs teeth, paws, EKGS, scanning their chips, numbered the dogs & started their notebooks that travel through the whole race. They said about 40% of these dogs actually had a heart murmur.