Toto, the beloved canine companion of Dorothy Gale in The Wizard of Oz, is a Cairn Terrier. This small, sturdy breed originated in the Scottish Highlands and is known for its intelligence, courage, and loyalty. Toto's portrayal in the film significantly increased the popularity of Cairn Terriers, making them a highly sought-after family pet. The character's presence adds a touch of innocence and adventure to the classic story.