Tongue-biting Cats and Cowardly Chickens?

Animal Idioms Explained

We’ve all heard the phrase “sly as a fox,” but how sly are foxes, really? Are foxes actually cunning and deceitful in their natural habitats? If not, how did this phrase enter the common vernacular? Should we really still be using this idiom?

I’ve done some basic research on the 4 animal phrases I hear a lot. With some exploration, I found the origin of sly foxes, dead horse beatings, feline tongue thieves, and cowardly chickens.