Thirteen

Thirteen
Jay petting Thirteen.
Species	Dog (Sheepdog)
Gender	Male
Affiliation	Ted Duffy, Mrs. Duffy, Alan Duffy, adoptive brother Barbie Duffy, adoptive sister Gordy Duffy, adoptive brother Corky Duffy, adoptive brother Flori Duffy, adoptive sister Tommy Duffy, adoptive brother Lionel Duffy, adoptive brother Jiro and Mito Duffy, adoptive twin brothers
Marital status	Single
Played by	N/A

Thirteen is a sheep dog and one of the main characters in the failed pitch for a prime-time animated television series called Duffy's Dozen. He had no lines.