Related Clues:

• "Heinz 57"-type dog
• Pound inmate, often
• Mix at the pound
• Mixed breed
• Paperless pet
• Pound denizen
• Pup without papers
• Unlikely dog for a canine registry
• Dog that's a little of this, a little of that
• Mongrel dog
• Pound hound, perhaps
• Benji, notably
• Hybrid pooch
• Pound pick
• Half-and-half, maybe