CatDog is an American animated television series created by Peter Hannan for Nickelodeon. The series follows the zany hijinks of golden-furred conjoined brothers of different species, with one half of the resultant animal being a cat and the other a dog. Nickelodeon produced the series from Burbank, California. The first episode aired on April 4, 1998, following the 1998 Kids' Choice Awards, before the show officially premiered in October of that year. Similarly, the Season 2 episode "Fetch" was shown in theaters in 1998 before airing on television.

Nickelodeon Animation Studio is an American animation studio owned by Paramount Global through the Nickelodeon Group. It has created many original television programs for Nickelodeon, such as SpongeBob SquarePants, The Fairly OddParents, Rugrats and Avatar: The Last Airbender, among various others. Since the 2010s, the studio has also produced its own series based on preexisting IP purchased by Paramount Global, such as Teenage Mutant Ninja Turtles and Winx Club. In November 2019, Nickelodeon Animation Studio signed a multiple-year output deal for Netflix, which will include producing content, in both new and preexisting IP, for the streaming platform.