Krypto, also known as
Superdog, is a
fictional character. He is
Superman's pet
dog in the various Superman
comic books published by
DC Comics. Krypto's first appearance was in a
Superboy story in
Adventure Comics #210 in March 1955. Although Krypto's breed is never specifically stated in the comic books, Krypto was drawn as a white dog of generic pedigree.