[[quoteright:250:[[WesternAnimation/KungFuPanda http://static.tvtropes.org/pmwiki/pub/images/b744983f49b99cd69b295ddd71a956d5.jpg]]]]
[[caption-width-right:250:Everyone knows tigers love tofu.]]

In RealLife, vegetation isn't necessarily the best source of food. It's hard to digest, is low in some essential nutrients, and requires a specialized digestive system in order to properly process it into anything useful for the animal eating said vegetation. On the plus side it's low in fat, and it can't run very fast. Because of this, most carnivorous animals are not well-adapted to eating plant materials (unlike herbivores, naturally).

In the world of fiction, however, this isn't the case. A normally carnivorous character can easily switch to a strictly vegetarian diet whenever he/she wants without worrying about digestive problems. This usually occurs in shows with many {{Funny Animal}}s as a means to address CarnivoreConfusion by establishing a normally carnivorous animal as someone who prefers dining on a carrot to dining on a rabbit. It is often used for MySpeciesDothProtestTooMuch characters to indicate that they have switched their diet to separate themselves from their more "predatory" associates. Or, though not as often, maybe they decide that hunting for food is too much work and decide to just switch to veggies.

A subtrope of CarnivoreConfusion and ArtisticLicenceBiology. Contrast AscendedToCarnivorism for when a normally herbivorous animal decides to eat meat. Compare with {{Veganopia}}. Vampires who refuse to feed on humans are common enough to have [[VegetarianVampire their own trope]].

'''Note:''' This only applies to carnivorous, and sometimes omnivorous characters that switch to eating just fruits, vegetables and other plant-based foods (and the occasional [[NoCartoonFish fish]] and/or [[WhatMeasureIsANonCute insect]]). Carnivorous characters that only switch from one type of meat to another are subversions.

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!!Examples:

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[[folder:Anime & Manga]]
* Several of the carnivores including the hero in ''Manga/KimbaTheWhiteLion'' became this trope when they are no longer allowed to eat each other under Kimba's new rule.
* Pretty much ''all'' ''{{Pokemon}}'' are shown to love eating berries (mostly because they also help heal various status effects in-game). This even includes what should be strictly carnivorous Pokémon like Mightyena (a hyena), Liepard (a leopard), and Arbok (a cobra).
** Subverted with Suicune. On the one hand, it does bear some resemblence to a cross between a canine and a feline (being compared to either a wolf or a cheetah by some fans). However, it has flat molar teeth and is actually based off of the Kirin (a mythical cross between a dragon and a horse), making it an ''herbivore''.
* In ''Manga/HyperPolice'' there is an anthropomorphic lion named Mr. Nupu. How is he first introduced into the show? He walks into a bar, huge and bulky and intimidating in an anthropomorphic lion sort of way and in a deep and serious voice orders.... a vegetarian stir-fry meal. Ba-dum bum!
* In ''Manga/AnimalLand'', this is one of Tarouza's goals in order to get meat eating animals to get along with plant eating ones. He finds the solution in the form of the Eternity Fruit.
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[[folder:Comic books]]
* ''All'' the carnivorous characters in ''Comicbook/CaptainCarrotAndHisAmazingZooCrew'', with the occasional exception of Peter Porkchops's old nemesis Wolfie. This is portrayed as a serious psychological problem on Wolfie's part and eventually leads [[spoiler: to him becoming a terrifying human-like creature called the [[OurWerewolvesAreDifferent Wuz-Wolf]]]].
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[[folder:Fairy Tales]]
* Subverted in a fairy tale where a little girl befriends a wolf she saved. The wolf tries to switch to a vegetarian diet (due to the girl not liking that he has to kill other animals to feed), but nearly starves himself in the process and ends up going back to his carnivorous diet.
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[[folder:Films -- Animation]]
* Tiger from ''WesternAnimation/AnAmericanTail'' is a vegetarian cat who is appalled at the very thought of eating mice. He does occasionally eat [[NoCartoonFish fish]] now and then, though.
* ''WesternAnimation/FindingNemo'' has a trio of sharks (led by a great white shark [[ShoutOut named]] [[Film/{{Jaws}} Bruce]]) that want to give up their fish-eating ways and become vegetarians. It's not made clear what they decide to switch their diet to, but it is shown in the film that they are struggling to make the change.
* Another subversion would be Chomper from ''WesternAnimation/TheLandBeforeTime''. When faced with the dilemma of [[CarnivoreConfusion being friends with sentient dinosaurs that are also potential prey]] he decides to switch his diet. Not to veggies, but to insects.
** An interesting variation occurs with the various pterosaurs ("fliers") in the films such as Petrie. Petrie is a ''Pteranodon''. ''Pteranodons''' diet consisted mainly of fish. However, Petrie and his family are vegetarians, yet it's never stated why.
* Simba from ''Disney/TheLionKing'' turns insectivore at the behest of his two animal friends. [[HakunaMatata Just let go of your worries]], and you too can grow big and strong on a morally-appropriate diet of creepy crawlies!
* Subverted with Alex the Lion from ''WesternAnimation/{{Madagascar}}''. He switches his diet to avoid eating his friends or starving to death, but to fish instead of veggies.
* ''Animation/TheSeventhBrother'', a film about a group of rabbits adopting a puppy, actually averts this. While Tiny tries eating the same plants the rabbits do for a while, he begins to grow sick and weak because he just can't live on the stuff. In the end, the rabbits return him to his human owners, and his health immediately begins improving once he starts eating dog food.
* The Creator/DreamWorks film ''WesternAnimation/SharkTale'' had Lenny, a shark that decided to go vegetarian (even the very thought of eating meat made him nauseous). He disguised himself as a dolphin in order to prevent other fish from fearing him, but even though dolphins are also predators.
* According to WordOfGod, this is the case for every carnivorous animal in the ''WesternAnimation/KungFuPanda'' universe. Tigress, Viper, and Mantis are shown to greatly enjoy Po's homemade noodles in vegetable broth, while in the spin-off series ''Legends of Awesomeness'', other characters, like the [[NeverSmileAtACrocodile Croc Bandits]] eat apples and other fruits.
* Heart from ''Anime/YouAreUmasou'' falls under this, being a ''TyrannosaurusRex'' raised by a family of ''Maiasaura''. It's later subverted, in that he does switch to a carnivorous diet (though he is horrified at first that he actually ''likes'' the taste of meat), but he will still eat berries now and again.
* ''Disney/{{Zootopia}}'' plays around with this trope. It's clearly established that the traditional food chain is no longer in place, averting SapientEatSapient in a WorldOfFunnyAnimals. [[DonutMessWithACop Officer Clawhauser]], an overweight cheetah, is only ever shown eating [[TrademarkFavoriteFood donuts]]. However, it's also been [[AllThereInTheManual confirmed]] that there is a fast food restaurant called Bug Burger that makes their food out of insects, and several [[NoCartoonFish fish markets]] can be seen in an establishing shot of Tundratown during the monorail ride, so it's clear that the carnivores still typically eat animal protein as a substantial part of their diet, even though mammalian prey are off limits to the point that eating them would be seen more or less as cannibalism.
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[[folder:Films -- Live-Action]]
* Godzilla Junior from the Heisei (1984-1995) era of ''Franchise/{{Godzilla}}'' films is shown to dine on leaves as a baby and toddler, despite the fact that it was established that Godzilla's species is carnivorous. Given that he started eating whales and presumably fish as a teenager, it seems like either he grew out of it or the species is actually omnivorous. Still got a mouth full of fangs though...
* ''Film/{{Godzilla 1998}}'': Zilla is something of an inversion. Marine iguanas are strictly vegetarians dining on seaweed, but Zilla's diet consists mainly of fish.
* The titular character from ''Film/TheodoreRex'' is a ''Tyrannosaurus'' and a "recovering carnivore". His diet mainly consists of vegetables and [[TrademarkFavoriteFood cookies.]]
* ''Film/SevenPounds'' has Emily, the female LoveInterest, claim her Great Dane is a vegetarian, eating only tofu and steamed broccoli. Obviously, the dog disagrees, devouring meat when offered it by Ben.
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[[folder:Literature]]
* ''Literature/ArashiNoYoruNi'' has this as a driving conflict of the plot, because the wolf Gabu is a carnivore but doesn't want to eat his goat friend, Mei. He tries to avoid eating meat, but finds he can't do it.
* The titular giant in ''Literature/TheBFG''. While his species is carnivorous, he has decided to eat a nasty-tasting vegetable called a "Snozzcumber" instead since he finds the idea of eating children appalling. Interestingly enough, it's the only other option he has besides eating humans since no other plants grow in Giant Land.
* The good-guy creatures of the ''Literature/{{Redwall}}'' series are mostly vegetarian, save the occasional fish or shrimp. This is plausible for the likes of mice and squirrels, but not for shrews or otters.
** The badger characters are also shown to have a mostly vegetarian diet. Like bears, badgers are actually omnivores and fruits and vegetation do take up a good portion of their diet along with insects and worms.
* ''Literature/ChildrenOfSteel'' had Terease, an anthropomorphic leopard raised by vegetarian humans. She took vitamin supplements at home but couldn't find them on the Astra, by the time Raj practically forced her to eat meat she was severely emaciated.
* Literature/{{Discworld}}:
** The Wowhawk is a special kind of bird of prey, "always on the lookout for the vegetarian option''.
** A vegetarian spider is briefly mentioned in the discussion of Discworld genetics; the wizards experimented with breeding fruit flies and peas, but misunderstood the basics, and said spider ate the buzzy green thing that resulted.
* Invoked but averted in ''The Unadulterated Cat'', also by Creator/TerryPratchett. The entry for "the green, organic, whole-earthbox cat" features a vegan couple who worked out "a vegetarian diet with occasional treats of fish" for their Siamese, and were blissfully unaware that it had consequently become one of the most dedicated hunters in the area.
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[[folder:Myths & Religion]]
* In a famous Korean myth, a tiger and a bear wanted to be human and, in order to do so, they had to eat nothing but garlic and herbs for 40 days. The tiger could not and gave up, while the bear persevered, became a woman, married a semi-divine being, and gave birth to the founder of the first organized Korean state. Note that bears are actually omnivores that can digest vegetable matter while tigers are obligate carnivore that cannot.
* In Literature/TheBible, Isaiah prophesies that when the Messiah comes to reign, "the lion shall eat straw like the ox," and animals will live together in peace.
* According to some Young Earth Creationists, carnivorous dinosaurs such as ''TyrannosaurusRex'' were (or once were) herbivores. When asked what the ''T. rex's'' razor-sharp teeth were used for, they replied that they were [[CriticalResearchFailure used for cracking open coconuts]].
** "Answers In Genesis" states that they either ate things like watermelons, or had different dental equipment before the fall of man (...long story there).
** There's a common creationist belief that ''T. rex'' was a herbivore because its teeth are shallow-rooted and thus tooth breakage would be a major problem for the animal. Before you point out that [[CriticalResearchFailure tyrannosaur teeth have roots twice the length of the crown and were firmly rooted in the jaw]], consider this question: Why would tooth breakage be an issue for an animal whose teeth constantly regenerates throughout its lifetime?
** Parodied [[http://pristichampsus.deviantart.com/art/The-Creationist-T-rex-165003798 here]].
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[[folder:Puppet Shows]]
* In the 90s Canadian kids show ''Series/ChickenMinute'' there is a fox named Minute that became vegetarian since start living in the same shack with a hen named Chicken Mama. He switch to eat popcorn, like a friend of theirs, Anatole Bonbon, an alligator.
* In Jim Henson's ''Series/{{Dinosaurs}}'', Robbie Sinclair, the son of a megalosaurus and an allosaurus, converts to herbivorism in the episode "I Never Ate For My Father". Earl is initially outraged, but learns to accept it. (This is a series where a major character is a carnivorous triceretops, so it seems diet is entirely a matter of choice.)
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[[folder:Video Games]]
* In the [[VideoGame/DonkeyKongCountry1 very first]] ''VideoGame/DonkeyKongCountry'' game, the crocodilian Kremlings stole the Kongs' Banana Hoard for its nutritional value. This is [[EarlyInstallmentWeirdness never brought up in later games]], where the Kremlings and other villains take the bananas to distract the Kongs from their bigger schemes (''VideoGame/DonkeyKong64'') and/or to exploit the magical powers of the fruits (''VideoGame/DonkeyKongCountryReturns'').
** In regards of the first game this becomes AccidentallyAccurate considering crocodilians do occasionally eat fruit, including bananas.
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[[folder:Web Comics]]
* Inverted in ''Webcomic/DominicDeegan'', where a character who failed to realise the difference between Orcs being herbivores and vegetarians (in this universe they're the former) tried to convince an Orc character to eat jerky to prove that they can eat meat. [[SubvertedTrope Vomiting ensues.]]
** The reason for the confusion is because orcs have massive tusks. The reason for ''that'' is because plant life in their native land is impossibly tough (when Luna saw an orc plant at one point, she thought it was the cutting board).
* The titular characters of ''Webcomic/OzyAndMillie'' appear to be vegetarian foxes, though it's not mentioned much, there's one strip where Millie's mom orders vegetarian soup and the clerk makes a big deal out of it. And Ozy's dragon dad prefers to roast tofu knights.
* ''Webcomic/RaineDog'' is vegan, apparently Creator/DCSimpson likes to insert that into her comics.
* In ''{{Webcomics/Meadowhawk}}'' a modern dragon muses on what his medieval ancestors would think of them [[http://meadowhawk.net/2013/04/13/bigger-questions/ eating tofu-and-broccoli stir fry]].
* In ''Webcomics/KevinAndKell'' it's unusual, and [[DoesThisRemindYouOfAnything generally frowned upon]], but happens now and then.
** [[spoiler:Bruno]], a wolf, becomes a closet grass-eater[[note]]he has a literal closet full of grass in his room[[/note]] under the influence of his herbivorous girlfriend and then goes openly "trans-diet" and has several stomachs installed surgically.
** In the first strip showing home life of [[spoiler:Ralph]], a wolf, after reuniting with his long-lost half-sheep daughter they are having a vegetarian meal.
** Sheila, Kell's near-identical cousin, went through several alternative lifestyles that included herbivorous diets. However, when she is first introduced, she has already become a "born-again meat-eater".
** Original description of the strip on [=CompuServe=] Funnies Forum stated that at home Kell cooks tofu making it look like meat products for herself and Rudy. This idea was never mentioned in the strips and after a while disappeared from the description.
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[[folder:Western Animation]]
* Parodied in an episode of ''WesternAnimation/{{Futurama}}''. An AnimalWrongsGroup claims that they have taught a lion to become a strict vegetarian. [[DeconstructedTrope The lion in question looks very sickly]] [[RealityEnsues and lets out a single pathetic-sounding cough.]]
* An episode of ''WesternAnimation/TheGrimAdventuresOfBillyAndMandy'' featured an old lady and her pet spider. Said spider was shown to love eating melons.
* ''TheSmurfs'' are shown to be mostly vegetarians in their cartoon show appearances, but have on occasion eaten meat-based products. Though it does make you wonder where the meat actually comes from.
* Parodied in an episode of ''WesternAnimation/SpongeBobSquarepants''. In the episode, the Flying Dutchman reveals that he devours people when they are shown to be lousy members of his crew. Spongebob remembers that he still has one wish left and wishes that the Flying Dutchman was a vegetarian and therefore wouldn't eat them. The Flying Dutchman then just turns them all into fruit so he ''can'' eat them.
* Subverted by ''WesternAnimation/TheGoodeFamily's'' dog Che. They think he's a vegetarian but he's actually responsible for a lot of missing neighborhood pets.
* One episode of ''WesternAnimation/JohnnyTest'' had a ladybug that loves to eat flowers.
* In the ''WesternAnimation/TinyToonAdventures'' episode, "Rock N' Roar", when Buster gets a [[DomesticatedDinosaurs pet]] ''[[DomesticatedDinosaurs T. rex]]'', which he names "Rover", he tries raising him to eat vegetables, since he has no meat byproducts. This doesn't work at first, and Buster is willing to sacrifice himself to keep Rover from going hungry, but Rover can't eat his own surrogate parent, so he agrees to let Buster feed him large amounts of vegetables.
* Bizarrely inverted by Leslie from ''WesternAnimation/TheAmazingWorldOfGumball'', who is a strict carnivore despite being an anthropomorphic ''flower''. He reasons that this way he's "[[CarnivoreConfusion not eating [his] own kind]]", and tries to get his cousin (a peanut) to do the same by taking an outraged tone while describing the way vegetables are prepared (in a parody of the way a stereotypical vegetarian talks about how livestock are treated). If Leslie also lives off sunlight like an actual flower isn't stated.
* Ginger, the cat who co-owns the village shop in ''WesternAnimation/PeterRabbit'' is vegan, although he does like cakes. Presumably the same goes for his canine partner Pickles. (Not the case in [[Literature/TheTaleOfGingerAndPickles the original book]], where they simply think eating customers is bad for business.)
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[[folder:Real Life]]
* The Giant Panda is a classic RealLife example. It's really an omnivore, and has a digestive system better suited for eating meat. However, its main diet consists of bamboo. This is because bamboo is plentiful and easy for the slow-moving panda to obtain as a food source rather than expending all of its energy chasing after prey. Their very inefficient digestion of bamboo makes them even more unsuited for hunting afterwards. So despite their reputation giant pandas ''will'' eat meat if given the opportunity. A video shows a panda eating a cow. This is one example of a species that [[CripplingOverspecialization evolved to be too specialised.]]
* [[http://scienceblogs.com/tetrapodzoology/2008/10/alligators_eat_fruit.php Some individual alligators are known to eat fruit.]] No one is quite sure why, and the alligators do still mostly eat meat when given the chance, but scientists think it may be an adaptation for when food supplies are low (and might help explain how crocs have survived as long as they have). Captive alligators seem to enjoy [[http://scienceblogs.com/tetrapodzoology/2009/06/27/alligators-vs-melons/ eating watermelon]] as part of enrichment.
* There's at least [[http://www.vegetarismus.ch/vegepet/tyke.htm one known]] example of a vegetarian lion, that made 9 years.
* Pet foods for dogs and cats typically contain a lot of vegetable matter, albeit processed for easy digestion by a carnivore.
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