Related Clues:

• Paperless pup
• "Heinz 57"-type dog
• Pound inmate, often
• Junkyard canine, perhaps
• Mix at the pound
• Nasty dog
• Dogcatcher's quarry
• Mixed breed
• Paperless pet
• Junkyard canine
• Loathsome sort
• Pound denizen
• Pup without papers
• Unlikely dog for a canine registry
• Dog that's a little of this, a little of that