Eugene Bostick has a 'Dog Train' that he uses to take his rescue dogs on trips about town. He came up with the idea when he saw someone use a similar contraption to transport rocks. The carriage is made up of plastic barrels that have been cut to allow room for the dogs. They are set onto metal frames with wheels, which are all interconnected and pulled by Bostick's tractor. 

View post on
Sources: The Dodo