Dog World was a series pitch created by Justin Roiland for Cartoon Network, with writing help from Ryan Ridley. Although he had many plans for the series, production "was moving forward about as fast as a redwood tree grows", so he decided to move on from the idea. The short is notable because its where the theme music of Rick and Morty was taken from, as well as being heavily referenced in the Season 1 episode Lawnmower Dog.