Related Clues:

• Lab greeting
• 'Ruff!'
• Woofer's output?
• Hidden theme of the puzzle
• Response to "Speak!"
• "Hiya, José"
• Sandy snippet
• Sound from a kennel
• Havana howdy
• Remark from Rex
• Sound from a woofer
• Chihuahua howdy
• It might mean "I'm hungry!"
• Pooch sound
• Dog's cry