Horses
A Realistic Horse Sim: Free, Across the Horizons, Adventures with Horses, Cascade Mountains, Corel Valley, Dreamscape Meadows, Equiness Harems, Equitopia, HorseWrold, Lost Souls
Wolves
Black Pines Canyon, Labyrinth, Loup Mortel, Phaden, Red Oak Wolf Pack, Silver Lake Mountains, Skoki Valley, Wolf Canyon
Biatrux
Players select from a list of animals and work with other characters to save the forest from evil.
Dog and Cat Wars
A game where you can be a cat or a dog. Based on the movie 'Cats and Dogs', you can be an undercover dog, or a cat on attack.
Paleofurs RPG
A message board and chat club based game for realistic (nonmorphic) animal fans interested in role-playing the Pleistocene (aka "Stone Age") epoch.
Wild Isle
This is a game with all animals, there is no limit to the type of animal you may be, though most members are predators.