cowsay has many questionable files that could attract copyright and trademark enforcement action. For further details see the pull requested linked below.
Debian packages cowsay. The cowsay source code repository is <https://github.com/tnalpgge/rank-amateur-cowsay>. The cowsay repository's CONTRIBUTING.md says "Issues and pull requests on that repository will be ignored.". I submitted a pull request <https://github.com/tnalpgge/rank-amateur-cowsay/pull/4>. I expect that it will be ignored. There is a fork of cowsay <https://github.com/cowsay-org/cowsay> that claims to be maintained. I have submitted a pull request to it as well. <https://github.com/cowsay-org/cowsay/pull/16> The pull requests remove the questionable files.