Granddad Dog (birth name Dallas Dog) is the father of Mrs. Dog, husband of Granny Dog, grandfather of Danny Dog and driver of his towtruck.
He is a bit of a showoff and enjoys taking Danny for long trips on the ocean with his big red boat. He is also good friends with Grandpa Pig although they usually get into fights, deciding which one of them has the better boat. He is also friends with Grampy Rabbit and on many occasions dislikes hearing his songs.
- In Under the Peppa (series), he is a villain.