Stray Dog

The Stray Dog is an enemy in, found in and around Podunk. Enemies with similar sprites include the Wolf, the Lone Wolf, and the Silver Wolf. A Stray Dog also guards Duncan's Factory, and will only let Ninten pass if he has a Pass. Even after presenting it to the dog, the pass is shown to have expired, and Ninten's party is attacked by the dog.

In-game description
"I wonder if it carries fleas?"