Last Updated: 22/10/2026
Specialty and Alternative Cat Food: Your Options Explained
Specialty and alternative cat food explained by vets: natural, grain free, vegan, rotational and irradiated diets, and what really matters.
Author: Dr Gillian Hill BVSc (Hons)
Reading Time: 4 minutes - short read
Search for cat food online, and it can feel like there's a new diet trend every week. Natural, grain free, rotational, even vegan. So which are worth a look, and which should you skip?
Specialty and alternative cat food covers any diet that goes beyond a standard complete and balanced kibble or tin, such as natural, grain free, and ethical and sustainable options, or following a particular feeding practice, such as rotational feeding. Some are worth considering, but vegan and vegetarian diets aren't suitable for cats, and irradiated food must never be fed to cats. Whatever the label says, what matters most is that the food is complete and balanced for your cat's life stage, which you can check by looking for an AAFCO or FEDIAF statement on the pack.
What is natural cat food?
Natural cat food is made from plant, animal or mined ingredients, and not containing any additives or processing aids that are chemically synthetic except in amounts as might occur in good manufacturing practices1. That's the definition AAFCO uses. It doesn't mean raw, organic or homemade, and it doesn't tell you whether the food is complete and balanced, so check the nutritional adequacy statement on the pack.
Learn more in our guide to the best natural food for cats.
What is grain free cat food?
Grain free cat food swaps grains like rice or corn for ingredients such as potato, peas or tapioca. It isn't carb free, and it isn't automatically better. True grain allergies are uncommon in cats. When cats do react to food, animal proteins like beef, fish and chicken are the more usual culprits.2
If your cat has itchy skin or an upset tummy, grain free isn't a reliable fix, so chat to your vet about the real trigger.
See the pros and cons in our vet's guide to grain free cat food.
Can cats be vegan or vegetarian?
No. Cats are obligate carnivores, which means they need certain nutrients from animal tissue, including taurine, arachidonic acid and vitamin A. Plants don't supply these in a form cats can use, and a shortfall can cause heart disease and vision loss that may take months to show. Vet prescribed diets that use plant proteins for a medical reason are different, and are formulated to be complete.
Find out more in can cats be vegan.
What is ethical and sustainable cat food?
Ethical and sustainable cat food uses traceable ingredients, humanely raised or sustainably caught proteins and lower impact packaging. These values sit on top of good nutrition, not in place of it, so the food still needs to be complete and balanced. Look for named meats, third party welfare certifications and recognised sustainable seafood standards.
Read our guide to ethical and sustainable pet food.
What is a rotational diet for cats?
A rotational diet means feeding your cat a few different complete and balanced foods in a regular pattern, changing the protein, texture or sometimes the brand. Some pet parents find it helps with fussy eating. The research on health benefits in cats is still limited, so it's a personal choice rather than a must do. Make changes gradually, and keep cats on a prescription diet unless their vet says otherwise.
Explore rotational diets for cats or the benefits of rotational diets.
Is irradiated food safe for cats?
No. Irradiated food must never be fed to cats. Irradiation doesn't make food radioactive, but it's still unsafe for cats. In Australia, cats that ate an imported irradiated dry food developed a serious neurological disease called leukoencephalomyelopathy, causing weakness and paralysis, mostly in the back legs, and in 2009 Australia stopped irradiating cat food.3,4 Irradiation is still used as a biosecurity treatment for some imported pet foods, so check labels on imported products, especially in a home with both cats and dogs.
What our vets see: This is one of the clearest "never" rules in cat nutrition, and the Australian cases are why. If a pack says it must not be fed to cats, take it literally.
Our explainer covers irradiated pet food in full.
What about raw, fresh or freeze dried cat food?
Raw, fresh, freeze dried and air dried foods are formats rather than diets, each with its own pros, cons and safety points.
Our guide to wet and dry cat food covers how raw, fresh, freeze dried and air dried options compare.
FAQs about specialty and alternative cat food
"Complete and balanced" matters more than any label. Natural, grain free, ethical and rotational diets can suit some cats, vegan diets aren’t suitable, and irradiated food must never be fed to cats. Not sure where to start? Our best cat food guide is a great first stop. Got a dog instead? Try our guide to specialty and alternative dog food.
References
AAFCO, 2025. Natural. https://www.aafco.org/consumers/understanding-pet-food/natural/, accessed 21/10/2026
Mueller RS, Olivry T, Prélaud P. Critically appraised topic on adverse food reactions of companion animals (2): common food allergen sources in dogs and cats. BMC Veterinary Research. 2016;12:9. https://pubmed.ncbi.nlm.nih.gov/26753610/, accessed 21/10/2026
RSPCA Australia. What is RSPCA Australia's position on the irradiation of imported pet food products? RSPCA Knowledge Base. https://kb.rspca.org.au/categories/companion-animals/cats/caring-for-my-cat/what-is-rspca-australias-position-on-the-irradiation-of-imported-pet-food-products, accessed 21/10/2026
Pet Food Industry. Australia suspends irradiation of cat food. 8 June 2009. https://www.petfoodindustry.com/articles/1142-australia-suspends-irradiation-of-cat-food, accessed 21/10/2026
WSAVA Global Nutrition Committee. Guidelines on Selecting Pet Foods. World Small Animal Veterinary Association. Updated 10 March 2021. https://wsava.org/wp-content/uploads/2021/04/Selecting-a-pet-food-for-your-pet-updated-2021_WSAVA-Global-Nutrition-Toolkit.pdf, accessed 21/10/2026
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History
Our experts continually monitor the health and wellness space and we update our articles when new information becomes available.
Wed 21 Oct 2026
Written by Dr Gillian Hill BVSc (Hons)Dr Gillian Hill BVSc (Hons)
Veterinarian
Dr. Gillian graduated from the University of Sydney in 2005 with a Bachelor of Veterinary Science. She worked in a number of small animal clinics, before joining the Pet Circle Vet team in 2020. Dr. Gillian has special interests in ultrasonography, surgery and behaviour. Her favourite part of being a vet is being an advocate for the animals. She loves helping owners to make the best, evidence-based decisions for their pets, and seeing the beautiful bond that people have with their fur-babies.
