Related Clues:

• ___ goo gai pan
• It might mean 'I want a treat!'
• It's heard from a herd
• Comment from Bossy
• Fido's reply
• Thin bark?
• Barn bellow
• 46-Down call
• Bossy sound
• Neigh : horse :: ___ : cow
• Less threatening sound than 'grr'
• Sound at the pound
• Toy sound?
• Yak like a cow?
• Corgi comment