When we colonise Mars, I'm sure a lot of people will want to take their pets along.
Until the terraforming process is complete, walking on the Martian surface will require a spacesuit, but this probably won't deter some from wanting to take a stroll. It would follow then that some might want to
take their dog for a walk.
The Rover Rover is a hemispherical glass dome containing an inclined, variable friction treadmill, and is hermetically mounted on continuous tracks.
The tracks are powered by a motor, which is electronically controlled by the speed achieved on the treadmill.
The variable friction treadmill is inclined slightly on its bearings so that when the dog starts to walk inside the dome, the belt of the treadmill moves backwards instead of the dog walking into the glass.
Resistance of the treadmill is finely controlled such that it would reduce as the dog picked up speed, allowing it to run as fast as it liked, but if it were to suddenly stop, it wouldn't fly into the rear glass, but come to a gradual stop in the centre of the dome.
The speed that the dog achieves on the treadmill would obviously determine the speed of the Rover Rover over the Martian landscape.
Some dogs could be trained to operate a robotic arm that can pick up sticks or rocks, and there would be an attachment for a leash.