The dogworld was a planet inhabited by poodles. The dogworld had pink skies and green rocks. It was roughly sixty light years from Earth. (PROSE: Mad Dogs and Englishmen)
Behind the scenes
The back cover of Mad Dogs and Englishmen calls the dogworld "Dog World", but in the narrative of the novel the planet's name is not a proper noun, but instead more of a description — "the dogworld". However, A Gamble with Wildthyme refers to the planet as "Dogworld". Enter Wildthyme stands halfway between these two stories by calling it "the Dogworld".