Install xcowsay by entering the following commands in the terminal:
sudo apt update sudo apt install xcowsay
Description:
Graphical configurable talking cow
A GTK+ version of the classic cowsay Perl script. It displays a cute pop-up cow on your desktop with a speech bubble and some customizable text. There's also a dream mode where the cow can display images. It comes with a fortune(6) wrapper script, xcowfortune, which you can cron to deliver periodic fortune cookies via the cow.
Homepage: http://www.doof.me.uk/xcowsay/
Version: 1.4-1
Section: universe/games