Related Clues:

• Borzoi sound
• Greyhound sound
• Sound from a little dog
• Bit of yapping
• Request for a treat, perhaps
• Beagle sound
• 21-Across greeting
• (I want a treat!)
• Sound from a schnauzer
• Kin of "Ruff!"
• "Woof!"
• One form of bark
• "Who's a good boy?" reply
• (I want to go for a walk!)
• (Go away, you scary mail carrier!)