Related Clues:

• Lab greeting
• 'Ruff!'
• Yammer
• Woofer's output?
• Hidden theme of the puzzle
• Response to "Speak!"
• Big mouth, in slang
• Sandy snippet
• Sound from a kennel
• "Shut yer ___!"
• Remark from Rex
• Puppy's call
• Sound from a woofer
• It might mean "I'm hungry!"
• Pooch sound