/usr/share/cowsay/cows/beavis.zen.cow is in cowsay-off 3.03+dfsg2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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## Beavis, with Zen philosophy removed.
##
$the_cow = <<EOC;
$thoughts __------~~-,
$thoughts ,' ,
/ \\
/ :
| '
| |
| |
| _-- |
_| =-. .-. ||
o|/o/ _. |
/ ~ \\ |
(____\@) ___~ |
|_===~~~.` |
_______.--~ |
\\________ |
\\ |
__/-___-- -__
/ _ \\
EOC
|