Not all Earth animals exist on Gor. Most specifically, the horse and dog do not exist on Gor except in legend and myth. The kaiila is similar in some ways to the Earth horse but there are no canine type species on Gor. As men have been brought to Gor from Earth they did bring their memories of such animals with them, thus they remain part of legend. There are other animals on Gor which have taken the place of such animals. For instance, kaiila and tharlarion are the common land-based mounts on Gor. Trained sleen do much that dogs would have done on earth such as guard herds and track. There may be other Earth animals that do not exist on Gor but they have yet to be specifically mentioned in the books as such.
Horses and dogs did not exist on Gor. Goreans, on the whole, knew them only from legends, which, I had little doubt, owed their origins to forgotten times, to memories brought long ago to Gor from another world. Such stories, for they were very old on Gor, probably go back thousands of years, dating from the times of very early Voyages of Acquisition, undertaken by venturesome, inquisitive creatures of an alien species, one known to most Goreans only as the Priest-Kings.
Savages of Gor - 16
Dragons of a sort do exist on Gor. The Ul, described as a carnivorous winged tharlarian, dwells in the vast swamps of the Delta. Dangerous and fast, they prey on the unwary.
