Related Clues:
- "Old MacDonald Had a Farm" sounds
- Noises that come from pens
- Pen output, perhaps
- Sounds from a 64-Across
- Snorts from snouts
- Old fluids in pens which pigs emit
- Gruff noises made by crew member bagging tat
- Pig talk
- Pig's greetings
- Good little fellows make GIs?
- GIs, slangily
- Sty emanations
- Tennis vocalizations
- Piglet sounds