Related Clues:

• Pound denizen
• Pup without papers
• Unlikely dog for a canine registry
• Dog that's a little of this, a little of that
• Mongrel dog
• Mongrel mutt
• Pound hound, perhaps
• Lowdown sort
• Mean dog
• Benji, notably
• Hybrid pooch
• Contemptible sort
• Mangy dog
• "Heinz 57" dog
• Pound pick