'''Duo''' is an unusual dog from the Isle of Phreex, belonging to Bébé Celeste. It is considered one of the most valuable creatures in the kingdom.

Duo has two heads, one on each end. When one end walks forward, the other is pulled backward, causing them to constantly bark and growl at one another.

All published appearances of Duo the Two-Headed Dog from before January 1, )-(95)}} are public domain in the US.

Some notable appearances are listed below:

*John Dough and the Cherub

*[http://oz.wikia.com/wiki/Duo Oz Wiki]
Category:Literary Characters
Category:1906 Debuts
Category:Reilly & Britton Characters
Category:L. Frank Baum - Creator

Category:Duos
Category:Numerically Themed Characters
Category:Multi-Headed Characters
Category:Dog Characters