In Stephen King’s novel Cujo, what breed of dog is Cujo?

In Stephen King’s novel Cujo, Cujo is a Saint Bernard.

Cujo begins as a large, friendly family dog owned by the Camber family. After being bitten by a rabid bat, he contracts rabies, and the disease transforms the familiar household animal into the novel’s central physical threat.

The choice of a Saint Bernard is significant because the breed is commonly associated with size, strength, and gentleness. King uses that familiar image to intensify the horror: Cujo is frightening not because he was originally vicious, but because illness destroys his normal behavior.

The novel’s title is simply the dog’s name. Readers sometimes remember the animal only as a generic “rabid dog,” but the breed is specifically identified as a Saint Bernard in the book and its adaptations.