Tuffy- A cat who was mistaken for a dog when he was very dirty. Before he was clean, he was mistaken for a dog by Whopper and became friends with him. However, after he was clean, Whopper was no longer his friend. After Tuffy saved Whopper and Bright Eyes from Catgut, Tuffy and Whopper were once again friends. He was the first cat to be adopted from the puppy pound. He appeared in Tuffy Gets Fluffy.