"What do you call a sheep with no…

Do sheep look like clouds? A riddle is:

Q: What do you call a sheep with no legs?
A: A cloud.

The joke has been cited in print since at least 1990 and has been printed on many images.

Google Groups: eunet.jokes
Get Well Soon
Neil Haddley
3/6/90
(...)
Q: What do you call a sheep with no legs ?
A: a cloud

Google Groups: rec.humor
Funky stuff - part 35
Henry Cate VII
10/12/90
(...)
What do you call a sheep with no legs ?
A cloud.

Google Groups: eunet.jokes
Dinosaur/Eyes/Fish/Deer/Surreal/Flame
Duncan Gibson
8/30/93
(...)
Q. What do you call a sheep with no legs?
A. A cloud! (yes, I know that if it was *really* surreal it would be something completely unrelated such as a screwdriver…)

30 August 1996, Star Tribune (Minneapolis, MN), “Straight Talk” by Jeffrey Zaslow, USA Weekend, pg. 18, col. 2:
“What do you call a sheep with no legs?” she asks. Johnson has no answer. She beams, pleased with herself. “A cloud,” she tells him.

Google Books
What Are You Like?
By Anne Enright
London, UK: Jonathan Cape
2000
Pg. 175:
One day she looked in for no other reason, it seemed, than to tell him a joke.

‘What do you call a sheep with no legs?’ she said.

‘I don’t know.’

‘A cloud.’

9 September 2001, The People (London, UK), “We join the hunt for the world’s funnies joke” by Caroline Barrett and Rachael Bletchly, pg. 8:
Q: What do you call a sheep with no legs?
A: A cloud.
- Actress Lisa Riley

Google Books
What a Joke!:
For Kids of All Ages
By Marlize Schmidt
Lulu Press (Lulu.com)
2014
Q: What do you call a sheep with no head and no legs?
A: A cloud.

Google Books
Srsly Best Jokes Ever:
Jokes for Kids
By Chantelle Grace
Racine, WI: BroadStreet Kids
2017
Pg. ?:
What do you call a sheep with no head and no legs?
A cloud.

Twitter
Shit Jokes‏
@ShitJokes
What do you call a sheep with no legs?
A cloud.
3:22 AM - 23 Aug 2017

Twitter
Cwings‏
@cwings
“What do you call a sheep with no legs?
A cloud”
7:50 PM - 17 Sep 2007

“What do you call a sheep with no legs?”/“A cloud.”