Related Clues:

• Word from a pen
• Sound on Old MacDonald's farm
• They come out of pens
• Noise from the farm
• Grunt
• Sound in 'Old MacDonald'
• Farm cry
• Barnyard sounds
• Pen chant
• Pen pal's response?
• Acts like a hog
• Sow sounds
• Sow's squeal
• Pig sounds
• Arnold's comment on "Green Acres"