Suspect the Iditarod Sled Dog Swiftly Runs in a Giant Exercise Wheel for Dogs

Iditarod racer Suspect the sled dog excitedly runs in an exercise wheel at the Husky Homestead in Denali Park, Alaska in a video from 2010. While normally considered a device for hamsters and other rodents, the giant exercise wheel helps fulfill Suspect’s instinct to run fast for long stretches at a time.

via Imgur