Winslow T. Oddfellow is the tritagonist in the Nickelodeon TV series, CatDog. He is a blue mouse with a big nose and wears overalls. He lives in CatDog's house in the hole in the wall. He is very troublesome with CatDog, especially with Cat, but he is friends with them. Winslow and Cat do not get along at all, because Cats chases mice. Dog, however, doesn't mind Winslow and is friendly with him. Deep down, he has a very big heart and loves CatDog and at some point act as CatDog's conscience and guidance of living in society, and does somehow think of them as a family and gives them advices, but acts out against them because he is jealous of how close they are. He is voiced by Carlos Alazraqui.
- In "CatDog Campers", Winslow is awarded for saving CatDog from falling off the cliff, but has his trophy taken away. He also become a new member of the Forest Fire Boys.