Related Clues:

• Pen emission
• Pen pal's greeting?
• Pig's remark
• Piggy plaint
• Pen plaint
• 'Old MacDonald Had a Farm' sound
• Babe-y talk?
• Pen call
• Pig's call
• Noise from a pen
• Grunt of pig
• Grunt of a pig
• Sound made by a pig
• Cartoon sound of pig
• Cartoon sound of a pig