History ArtisticLicenseBiology / WarriorCats

* Digging tunnels is a large part of the lore. While cats can dig, they can't dig tunnels like depicting in the books.
* Each cat has their own "den" (or a specific nest within a den they share with others) that's their exclusive sleeping place, similar to how we have our own beds. This is not realistic in terms of cats. Cats don't make dens like foxes, and while they do pick favourite sleeping areas, they have plenty of variation in their sleeping spots.

* The cats seem to [[UnexpectedlyHumanPerception see the world like humans]], not cats. They see colors that cats appear not to be able to (or at least, see differently than humans). Much of the series revolves around the colour red, but cats can't see red.
** The series revolves around the color of fire, which cats can still perceive and name.
* Jayfeather is unrealistic for a blind cat. Cats aren't as visual-centered as humans, and as such most cats who are blind from birth have minimal impairments. Many can even hunt just fine.
* Kittens aren't portrayed correctly to scale. By six months, most cats are 75% of their adult size. Kits are portrayed as much smaller than they actually are, and even ''apprentices'', which are usually between six months and a year in age, are much smaller than adults -- they're written as essentially feline teenagers, when they should be at neatly their adult sizes.

* Hunting is much simpler in ''Warriors'' than it is in real life. While characters do sometimes fail to catch prey, most of the time they essentially just sniff around, see a vole or mouse, pounce, and catch it. In real life cats fail to catch prey almost 100% of the time. They also don't always easily kill prey (hence why cats are known to "play" with their prey, in order to ensure an animal is weakened and stunned before going for the kill[[note]]Code 4 is actually "Prey is killed only to be eaten", which means it's against the Warrior Code to play with prey, even dead prey[[/note]]). The cats' choices of food are also unrealistic. [=WindClan=] primarily eat rabbits and [=RiverClan=] primarily fishes. Rabbits are too large for domestic cats to hunt often (''dogs'' are more likely to hunt rabbits) while cats, with a couple of exceptions like the wildcat species known as the "fishing cat", aren't known for fishing much.

* Dogs are a third threat to cats, but in real life it often depends on the dog's personality and how they are trained regarding their relationship with cats.

* Foxes are portrayed as one of the many big predators of cats, are highly aggressive and have other behavioral traits akin to wolves and other larger canines, often seen attacking cats for no apparent reason. In real life, cats and foxes are actually equally matched predators. While there have been cases of foxes killing cats in real life (most being kittens and sick cats), they are much more shy and are opportunist hunters, and would have a fair reason to attack such as defending its young if someone strays too close to its den. There also have been cases of the opposite, where cats attack and kill foxes instead.

** According to ''Moonlight'', foxes don't talk about much besides killing. Foxes in real life are not any less than intelligent than cats and are omnivores, with the only animals they normally hunt and eat are small mammals like rodents and other prey the Clan cats would normally hunt.

** According to ''Moonlight'', foxes don't talk about much besides killing. Foxes in real life are not any less than intelligent than cats and are omnivores, with the only animals they hunt and eat are small mammals like rodents and other prey the Clan cats would normally hunt.

* Foxes are portrayed as one of the many big predators of cats, are highly aggressive and have other behavioral traits akin to wolves and other larger canines, often seen attacking cats for no apparent reason. In real life, cats and foxes are actually equally matched predators. While there have been cases of foxes killing cats in real life, they are much more shy and are opportunist hunters, and would have a fair reason to attack such as defending its young if someone strays too close to its den. There also have been cases of the opposite, where cats attack foxes instead.

* Foxes are portrayed as one of the many predators of cats, are highly aggressive and have other behavioral traits akin to wolves and other larger canines, often seen attacking cats for no apparent reason. In real life however, foxes tend to be much more timid and highly unlikely to attack cats (they may sometimes attack kittens though) and if anything, would have a fair reason to if it does such as defending its young if someone strays too close to its den.

** According to ''Moonlight'', foxes don't talk about much besides killing. Foxes in real life are not any less than intelligent than cats and are omnivores, with the only animals they hunt and eat are small mammals like rodents.

** According to ''Moonlight'', foxes don't talk about much besides killing. Foxes in real life are not any less than intelligent than cats.

** In the manga series an unusually large fox (roughly appearing to be the size of a real-life coyote) is taking on a group of cats. In reality, foxes are only slightly bigger than cats and are especially unlikely to face a whole group of cats.

* Foxes are portrayed as one of the many predators of cats, are highly aggressive and have other behavioral traits akin to wolves and other larger canines, often seen attacking cats for no apparent reason. In real life however, foxes tend to be much more timid and highly unlikely to attack cats (they may sometimes attack kittens though) and if anything, would have a fair reason to if it does such as being provoked or defending its young if someone strays too close to its den.

* Foxes are portrayed as one of the many predators of cats, are highly aggressive and have other behavioral traits akin to wolves and other larger canines, often seen attacking cats for no apparent reason. In real life however, foxes are highly unlikely to attack cats (they may sometimes attack kittens though) and if anything, would have a fair reason to if it does such as being provoked or defending its young if someone strays too close to its den.

* According to ''Moonlight'', foxes don't talk about much besides killing. Foxes in real life are not any less than intelligent than cats.

* Cat pregnancies are depicted as longer than they actually are. Birthing is also portrayed as [[ScreamingBirth painful, difficult]] and as [[DeathByChildbirth prone to complications]] as human childbirth, as well as very quick, with the kittens coming one right after another and the whole thing lasting less than an hour. In real life, cat births are much easier than human births, a trait common in all quadrupeds -- for obvious reasons, the less likely an animal is to die in childbirth or miscarry, the likelier it is that she will pass on her genes in surviving offspring. As such, natural selection has ensured that most mammals can give birth with ease -- human childbirth complications are mostly due to our fairly quick shift to full bipedalism causing some drastic rearrangements of our internal anatomy that we haven't had time to evolve past yet. Also, cat births tend to be fairly long -- the whole process usually takes up to twelve hours, with the mother having time to thoroughly clean and groom each kitten before the next is born.

* No mention is made of heat cycles; female warriors seem to be able to get pregnant and have kits whenever they feel like it. Real female cats can only get pregnant during their heat cycles.

* [=LionClan=], [=TigerClan=], and [=LeopardClan=] are legendary Clans. The problem is that tigers and leopards are solitary animals (and it's unlikely they'd all interact anyway). The cats also believe that they're descended from these clans. Domestic cats are actually distantly related to big cats. They're directly descended from the African wildcat, a tiny species that resembles a tabby. This is justified, however, as by the authors' statement these are purely fictitious in-universe myths -- some characters believe it, but it never actually happened.