Get

In Your Inbox

Catster is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Can Cats Be Vegan? Vet-Reviewed Facts

cat looking at bowl of raw veggies

People choose to be vegan for various reasons, including a desire to reduce their carbon footprint, a need to improve their health, and everything in between. As an autonomous person, you can choose to do anything that you wish regarding your health, dietary intake, beliefs, and actions. But your cat doesn’t have such choices. Instead, they must depend solely on you to make all the decisions about their life.

Many vegans find themselves in a moral conundrum when their beliefs are challenged by their pet cats, as their diets consist of animal-based foods, which are strictly against the vegan code. So, what are you to do? Should you feed your cat a vegan diet?

This is a hot topic, and while some vegan groups claim that you can do it healthily if you pay careful attention and work diligently at it, veterinary experts disagree. The ASPCA even goes so far as to say, “a vegan diet is not appropriate for cats at all.”divider 1 paws

What’s Unhealthy About a Vegan Diet for Cats?

Cats are obligate carnivores. This means that they must eat the flesh of other animals in order to be healthy and thrive. Certain nutrients that exist only in meat are necessary for a cat’s health, including the following nutrients. Without sufficient amounts of each, a cat cannot achieve peak health. It is always the best idea to ask a veterinarian about the best diet for your cat.

Need veterinary advice but can't get to the clinic? Catster recommends PangoVet, our online veterinary service. Talk to a vet online and get the answers and advice you need for your cat without having to leave your living room — all at an affordable price!

PangoVet_Mention-in-Content for PangoVet2 save money

Protein

Animals contain very few carbohydrates; they’re mostly protein and some fat. In the wild, this is what a cat’s diet would consist of entirely. Because of this, feline bodies have adapted to using protein for energy, powering most of a cat’s bodily processes.

Plants simply don’t contain enough protein to fulfill a feline’s needs. Even if you manage to source enough plant-based protein to meet a cat’s overall protein needs, not all proteins are equal. Each is made up of specific chains of amino acids, and your cat needs specific amino acids that simply aren’t found in plants. This is why they’re obligate carnivores; eating meat is an obligation.


Carbohydrates

Cats are not good at digesting carbohydrates because the animals that they prey on don’t contain many carbohydrates. A cat’s body doesn’t use carbohydrates for energy the way a person’s or a dog’s body does.


Taurine

Taurine is a very specific amino acid that’s only found in animal sources. No plants create or contain this amino acid. While humans and canines can synthesize this amino acid in our bodies, cats cannot. If they don’t consume enough taurine because of their vegan diet, a cat will develop a deficiency.

A deficiency of taurine doesn’t sound so bad until you know what it causes. It can easily become dilated cardiomyopathy (DCM). DCM is a heart condition that causes the muscles of the heart to become thin and weak, so it can’t supply enough blood and oxygen to the body. It’s fatal if not treated in the early stages.

Slightly less severe is the chance of eye problems. Cats that are deficient in taurine commonly develop an eye condition known as feline central retinal degeneration.


Arachidonic Acid

Arachidonic acid must be provided in your cat’s diet, as they cannot manufacture it themselves. It’s an essential fatty acid that’s necessary for your cat’s inflammatory response. Additionally, it aids in blood clotting and skin growth, and it’s needed for proper reproductive function. Arachidonic acid is almost solely available from animal sources.


Vitamin A

Vitamin A is another essential nutrient that your cat must consume, or they may face a litany of health concerns. For a cat to eat a vegan diet, vitamin A would have to be supplemented, but you’ll have to be very careful to monitor the intake because vitamin A toxicity is also a problem.

If your cat is deficient in vitamin A, they could experience:
  • Delayed growth
  • Loss of appetite
  • Eye infections
  • Night blindness
  • Poor muscle coordination
  • Brain damage

Should you overdo the vitamin A supplementation and cause vitamin A toxicity, the results could be sudden if a cat ingests too much vitamin A at once or delayed when the cat is over supplemented and accumulates vitamin A over time.

Signs of sudden vitamin A poisoning
  • Vomit
  • Drowsiness
  • Peeling of the skin
  • Irritability
Signs of vitamin A toxicity
  • Rough coat
  • Constipation
  • Weight loss
  • Excessive abnormal bone development
  • Limited movement
  • Fused vertebrae
  • Muscle soreness
  • Neck pain
  • Difficulty eating
  • Lameness
  • Withdraw of contact
  • Bone fractures
  • Decreased liver function
  • Paralysis
divider 1 paws

If Dogs Can Do It, Why Not Cats?

It’s true that dogs can survive on a vegan diet. However, this takes very close monitoring by the person administering said diet, including supplementation and careful sourcing of specific foods. Even still, it’s not recommended for dogs either.

But dogs can survive on such a diet because they’re omnivores like us. Omnivores can get their nutrient needs through a combination of both plant-based and animal-based foods. Even for omnivores, though, it’s difficult to fully meet their nutritional needs without meat. Humans also have to take care to supplement and eat special foods designed to make up for what their diet lacks, and many are still deficient.

Cats are obligate carnivores, which is quite different from being an omnivore. They absolutely require animal-based foods in their diet to meet their nutritional needs. It’s an obligation for them.

divider 1 paws

Conclusion

Cats must eat animal-based foods because they’re obligate carnivores, unlike people and dogs that are omnivores. Still, you can do your part to help reduce your cat’s carbon footprint by purchasing your cat food from eco-friendly companies that ethically source their ingredients. This enables you to stay true to your vegan ideals without putting your cat at risk, which, ironically, would be against those ideals, anyway.


Featured Image By: Scharfsinn, Shutterstock

Want content like this delivered to you?

Sign Up For Our Newsletter

News, insights, expert advice, and everything cat

* By submitting, you agree to our Terms & Conditions and Privacy & Cookies Policy.

How useful was this post?

Click on a star to rate (you can leave written feedback after clicking submit)

Help us improve Catster for pet parents!

Your feedback really matters.

What did you like about this post? Also how can we improve it?

Join the conversation

Leave a Reply

You’re very welcome to leave a comment or question. Please know that all comments must meet our community guidelines, and your email address will NOT be published. Let’s have a positive and constructive conversation.

Talk With A Vet Online

Peace of mind,
anywhere, anytime

Affordable vet advice

How Far Do Feral Cats Roam? Vet-Reviewed Facts & FAQ

If you spend any time outdoors, you’ve most likely seen what you believe to be a feral cat. These cats are often confused...

Savannah Cat Health Problems: 8 Vet-Reviewed Issues

The Savannah Cat is a large cat breed that’s known for its intelligence, playfulness, and athleticism. The Savannah Cat hybrid is the result...

Siamese Kittens for Sale in Connecticut & Nearby States: Breeders List 2025

Catster advocates for adopting before shopping, though we fully understand there are many reasons for seeking a breeder. So, we encourage it to...

Is Catnip Good for Cats’ Digestion? Vet-Reviewed Nutrition Facts & FAQ

Catnip is an herb related to mint that originated in Asia and Europe. It has green or gray-green leaves, light green stems, and...

More related

26 Medium-Hair Cat Breeds (With Info & Pictures)

If you don’t have time for the constant grooming that a longhaired cat requires but you still want a soft, fluffy feline, a...

Can Cats Eat Hummus? Vet-Reviewed Nutrition and Safety Facts

Hummus is a popular Middle Eastern food enjoyed by many Americans. You can enjoy hummus as a dip, dish, or spread, and if...

How to Care for a Tortoiseshell Cat: 9 Vet-Approved Tips

You’ve decided to adopt a Tortoiseshell cat and give them a forever home. Now, you’re wondering how to care for your new little...

Can Cats Eat Guava? Vet-Approved Facts & FAQ

Guava is a popular fruit for various reasons. It’s no shocker that humans delight in and derive nutrients from this tropical fruit. But...

Keep reading

How to Stop Cats From Fighting: 5 Vet-Reviewed Tips & Tricks

Intact cats are territorial and on the prowl for mates. You can curb aggressive You love your cats, and you’d love for them to get along with each other. Are catfights taking away from the peace and tranquility of your...

domestic-cats-fighting

My Cat Swallowed a Foreign Object: When to See a Vet

Cats love to play with anything that they can get their paws on, such as buttons, balls of paper, bits of string, threads, shoelaces, ribbons, cords, and yarn. Unfortunately, while playing with these seemingly harmless objects, our feline companions can...

a siamese cat getting examined by a vet at the clinic

Why Is My Cat’s Meow Suddenly Hoarse? 9 Vet-Verified Reasons

Cats are capable of making quite a few vocalizations. They meow, chatter, trill, purr, and hiss. All these sounds are unique ways that cats communicate with us and other animals (and sometimes, they’re just talking to themselves). But what if...

abyssinian-cat-meowing-at-the-sofa

Can Cats Eat Mint Ice Cream? Vet-Reviewed Health Facts

It’s funny that cats are often portrayed lapping at saucers of cream or a dish of milk, because the fact is, cats shouldn’t have dairy. While kittens can handle milk, most cats begin to become lactose intolerant after they reach...

Can Cats Eat Mint Ice Cream

Can Cats Eat Worms (Earthworms)? Vet Approved Facts & Safety Tips

Cats are carnivores by nature, and they’ll chase after and hunt any animal they can when they’re outside. This includes even the smallest, most unlikely of prey, such as earthworms! Cats are opportunistic hunters who’ll eat any small creature if...

Can Cats Eat Worms (Earthworms)

Should I Euthanize My Cat With Diabetes? Vet-Reviewed Facts & FAQ

Deciding whether or not to euthanize a beloved pet with diabetes is one of the most difficult decisions a pet owner can face. Diabetes is a serious condition that affects cats, and if left untreated, it can lead to significant...

cat with intravenous infusion drip in vet clinic

How to Introduce a Puppy to Cats (10 Vet-Verified Tips)

If you already have a cat at home but are considering adopting a puppy, you might be wondering if there are any steps you can take to minimize stress for all parties involved. Cats often don’t react well to changes...

a cat and a puppy outside

Is Your Cat a Vertical Pee-er? What to Do & How to Help (Vet-Reviewed)

Cats can develop strange habits that leave us feeling perplexed. One such strange behavior is vertical peeing. Cats can start to pee vertically for a variety of reasons. Sometimes, it has to do with marking their territory, while other times,...

Cat Pee Spray