“What do you call a pig with no legs?”/“A groundhog.”

A pig riddle has been printed on several images:
 
Q: What do you call a pig with no legs?
A: A groundhog.

 
The joke (popular on Groundhog Day) has been cited in print since at least 2001.
 
     
Google Books
Liza’s Star Wish
By Diane Stevens
New York, NY: Greenwillow Books
1997        
Pg. 52:
“Liza, know what you call a pig with no legs?” I didn’t. “Ground pork,” he said.
 
29 January 2001, The Post-Star (Glens Falls, NY), “Shortcuts” by Jeff Harris, pg. E2, col. 1:
What do you call a pig with no legs?
A ground hog.
 
Twitter
Marley The Dog‏
@marleyterrier
#hamfest Q: What do you call a pig with no legs? A: A groundhog!
8:17 AM - 21 Jul 2009
 
Reddit—Jokes
I found the one joke that no matter who you are, you’ll at least smile when you hear it (self.funny)
submitted September 16, 2013 by Resieh
Q - What do you call a pig with no legs? A - A Groundhog
I’m sure some of you will lie and say you didn’t smile or laugh, but I know you did. I’ve told this joke several times and everyone at least smiles.
     
Reddit—Jokes
What do you call a pig with no legs?
submitted March 3, 2014 by [deleted]
A groundhog
     
Google Books
Peppa Pig Jokes For Kids
By Jack Jokes
PeteyRF Creative
2016
Pg. ?:
What do you call a pig with no legs?
A groundhog.
 
Google Books
Roald Dahl:
Whizzpopping Joke Book

By Roald Dahl
London, UK: Puffin Books
2016
Pg. 61:
What do you call a pig with no legs?
A groundhog!
 
YouTube
Ok, here is the joke. What do you call a pig with no legs? A g…
botcaster inc. bot
Published on Jan 22, 2016
What do you call a pig with no legs?
A groundhog!
 
Reddit—Jokes
What do you call a pig with no legs?
submitted February 2, 2017 by mattyr33
Ground Hog! Happy Groundhog’s Day!
 
Reddit—Jokes
What do you call a male pig with no legs and delusions of being a weather forecaster?
submitted June 21, 2017 by Mechasteel
Groundhog
 
Twitter
Lucky Score‏
@LuckyScoreNet
What do you call a pig with no legs?
A
groundhog!
#Joke from #PigJokes in #Jokes, #Humor and #Satire
8:17 PM - 23 Jan 2018