Related Clues:

• Terrier's threat
• Canine sound
• Hostile sound
• Seal sound
• Unhappy response
• Fido's utterance
• 'Arf' sound
• Bite preceder
• Canine comment
• "Don't mess with me!"
• Kennel warning
• Warning to the postman
• ''I'm mad!''
• Lab's warning
• Chow line?