The run.py script indicates this is running on a Raspberry Pi to read GPIO pins i.e. you could literally just hook up a button to a GPIO pin and train your dog to stomp on the button.
We've been meaning to find out what one of our dogs actually is since we've been asked so many times and we have no idea.
The "psychotic girlfriend" side of untrained large dogs has been known to maul children.
For the record, most sled dogs are not very large and not particularly aggressive.