There's a sort of "practice" in the U.S. of owners of stores or businesses putting up billboards on their properties and using them to post wise, witty, pithy, or just generally humorous sayings.

This is a good selection of them mostly regarding animals put up by a vet:

https://www.thefunpost.com/en/trip-m...?ly=native_one

A few contain puns so may not make total sense to non-native English speakers.