“What do cows eat for breakfast?”/“Moosli.”
A cow riddle is:
Q: What do cows eat for breakfast?
A: Moosli.”
The “moosli” joke (moo + muesli) has been cited in print since at least 2001.
Wikipedia: Muesli
Muesli (/ˈmjuːzli/ or /ˈmuːzli/; Swiss German: Müesli [ˈmyəsli], non-Swiss Standard German: Müsli [ˈmyːsliː]) is a breakfast and brunch dish based on raw rolled oats and other ingredients like grains, fresh or dried fruits, seeds and nuts, that may be mixed with cow’s milk, soy milk, almond milk, other plant milks, yogurt or fruit juice. Developed around 1900 by Swiss physician Maximilian Bircher-Benner for patients in his hospital, muesli is available ready made in a packaged dry form, or it can be made fresh.
Google Books
The J-files
By John Parsons
Cheltenham, UK: Nelson Thornes
2001, ©2000
Pg. 24:
“What do cows eat for breakfast?
Moo-sli!”
18 March 2001, Sunday Telegraph (Surry Hills, New South Wales), “The Funday Telegraph” by Matthew Frilingos, pg. F1:
What do cows eat for breakfast?
Mooselie
The Scotsman
Top jokes to cheer you up
Published: 08:54 Updated: 13:39 Friday 19 December 2008
(...)
Lynne McNicoll, fundraiser for Teenage Cancer Trust:
Q: What do cows eat for breakfast?
A: Moooosli.
Twitter
David Mascord
@DavidMascord
@farmersweekly bad #farm joke What do cows eat for breakfast? Moosli
9:59 AM - 13 Mar 2009
Twitter
Demi
@2014YearOfHobsX
What do cows eat for breakfast? muuuuuuesli. - A joke made by @HobbieStuart #BlessHim
5:53 PM - 29 Jan 2013
Google Books
Horrid Henry’s Jumbo Joke Book (3-in-1)
By Francesca Simon
London, UK: Orion Children’s Books
2015
Pg. ?:
What do cows eat for breakfast?
MOOOuesli.
Reddit—3amjokes
What do cows eat for breakfast? self.3amjokes
Submitted September 21, 2015 by killer-on-the-loose
Mooselli
Reddit—Jokes
What do cows eat for breakfast?
submitted September 29, 2017 by 4rp4n3t
Mooooosli.
Twitter
Alan Caulfield
@alan_caulfield
Replying to @willpenrievans @ZwartblesIE and 2 others
What do cows eat for breakfast?
MOO-sli
(from my 6yo)
11:55 AM - 30 Sep 2017