Can my dog be vegan? What UK vets and welfare charities say

More people in the UK are eating plant-based diets, and many wonder whether their dog could do the same. The short answer is that it's possible, but it carries more uncertainty than a conventional diet. This guide sets out what UK vets and welfare charities currently say, so you can make an informed choice with your vet.

Can dogs be vegan?

Dogs are omnivores. PDSA explains that, unlike their wolf ancestors, dogs can eat and get nutrients from plant foods as well as meat. So, as long as a diet contains all the essential nutrients, a dog can technically eat a vegan diet.

"Technically possible" isn't the same as "proven safe". The British Veterinary Association (BVA) says it is possible to feed dogs a plant-based diet. But owners need to know that these diets are hard to balance, that robust long-term safety data is lacking, and that their dog's health should be monitored for long-term effects.

What UK vets and welfare bodies say

None of these organisations recommends vegan diets as better for dogs. All of them stress that what matters is a complete and balanced diet, and that you should talk to your vet before changing.

What does the research show?

The BVA notes that several studies have reported positive results for vegan and vegetarian diets in dogs. However, these studies are usually small and often rely on what owners report, rather than on vet examinations. Longer, controlled studies are needed to show these diets are nutritionally safe.

One of the longer clinical studies so far, published in PLOS One in 2024, followed a small group of healthy adult dogs fed a commercial plant-based diet for a year. Their examinations and blood results stayed within healthy ranges. That's encouraging, but a small group of healthy adults can't tell us how puppies, older dogs or dogs with health conditions would do over a lifetime.

Why balance is the challenge

A BVA past president has explained that synthetic nutrients can be added to vegan pet foods. The question is whether dogs can absorb and use them properly (their bioavailability), and whether they affect how other nutrients work. Nutritional imbalances can take a long time to show, which is why long-term data matters.

Is it cruel or illegal to feed a dog a vegan diet?

The diet type itself isn't the issue. In England and Wales, the Animal Welfare Act 2006 requires people responsible for an animal to meet its needs, including its need for a suitable diet. Similar duties apply in Scotland under the Animal Health and Welfare (Scotland) Act 2006 and in Northern Ireland under the Welfare of Animals Act (Northern Ireland) 2011. Blue Cross points out that any diet that fails to give a dog the nutrition they need puts them at risk of serious health problems, whether it's vegan or meat-based.

How to reduce the risks if you choose a vegan diet

1. Talk to your vet first. PDSA notes that some dogs have dietary needs that a plant-based diet can't meet. Blue Cross also recommends advice from a qualified veterinary nutritionist.
2. Choose a complete, commercially made food. It should be suitable for your dog's life stage. PDSA suggests checking the manufacturer is a UK Pet Food member.
3. Check the manufacturer. Blue Cross advises choosing a reputable company that can show its food is complete and balanced.
4. Never make vegan food at home. PDSA, Blue Cross and UK Pet Food all advise against homemade diets, because they're very hard to balance.
5. Switch gradually. Change food slowly over several days or more to avoid an upset tummy.
6. Keep a close eye on your dog. Watch their weight and general health, and keep up regular vet checks. Tell your vet what you're feeding.

What about dogs with food allergies?

A dog with a suspected food allergy needs a vet's help to find the cause. Don't switch to a vegan diet as a home remedy. PDSA notes that some hypoallergenic dog foods happen to contain no animal products, even though they aren't sold as vegan. Your vet can advise whether one of these is right for your dog.

Can cats be vegan too?

No. The BVA says current research suggests it isn't possible to make a complete vegan or vegetarian diet for cats. Cats are obligate carnivores and need nutrients found in meat.