Related Clues:

• Sounds coming from fold or stable
• South African leader bleats
• Barnyard bleats
• They're heard in a herd
• Calls from a 27-Down
• "The Whiffenpoof Song" sound effects
• Sheep noises
• Pasture calls
• The non-silence of lambs
• Barnyard bellows
• Calls to Bo Peep
• Meadow bleats
• "The Whiffenpoof Song" repetitions
• Ovine calls
• Abraham's regularly heard these from his flock?