Do We Have This One Already? I know this trope has a ton of examples but most of them slip my mind at the moment. Needs more examples. Save a few exceptions, dogs are cute and cats are cute. Neither one generally preys on the other in the wild. And while there are many cases of the two species fighting each other,◊ there are also a fair amount of cases of them getting along peacefully.◊ That's Real Life. So why is it in fiction they always seem to be mortal enemies set on destroying each other? Maybe it's for the sake of humor, or maybe it's expected to be taken seriously. Maybe the author hates one of the species, or just likes the other better. Maybe it's to overexaggerate their natures. Either way, this trope is a classic animal stereotype in fiction. If it's a universe where dogs are good, then the villain is probably a cat, and vice versa.
Examples in fiction:Comic Books