Related Clues:

• Boxers, derogatorily
• Wrinkly-skinned dogs
• Flat-faced canines
• Snub-nosed dogs
• Ones with faces only a mother could love
• Prize-fighters
• Boxers
• Flat-nosed dogs
• Wrinkly-skinned pooches
• Wrinkled-skin dogs
• Wrinkle-faced dogs
• They slug it out
• Prizefighters
• Wrinkly-faced pooches
• Dogs with square muzzles