A little is fine; a lot is harmful. Liver is rich in protein and nutrients, but it is very high in vitamin A, and feeding it often can cause vitamin A toxicity that damages a cat's bones and joints. A small piece of cooked plain liver occasionally is safe; frequent servings are not.
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Caution — vitamin A builds upAmount, form, or frequency matters
Can cats eat liver? 🍖
A little is fine; a lot is harmful. Liver is rich in protein and nutrients, but it is very high in vitamin A, and feeding it often can cause vitamin A toxicity that damages a cat's bones and joints. A small piece of cooked plain liver occasionally is safe; frequent servings are not.
Source-linked record · Last reviewed July 17, 2026 · Not veterinary advice
Why this answer
Liver is packed with preformed vitamin A, and unlike some species cats do not regulate excess vitamin A well. Fed regularly, it can lead to hypervitaminosis A, which causes painful bony growths, stiff joints, and skeletal problems over time. In small, occasional amounts liver is a nutritious treat, but the narrow margin between a healthy treat and too much is why it stays a caution.
Watch for
With frequent feeding: stiffness, limping, or reluctance to move
Neck or joint pain and bony overgrowths over time
Constipation or digestive upset from a large serving
Lethargy or a poor coat with chronic excess
How much is okay
A pea-sized piece of cooked plain liver no more than once a week or so; never a daily food, and less for kittens.
Serve it safely
Cook liver plainly — no onion, garlic, salt, or sauce.
Offer a very small piece and keep it infrequent.
Do not combine liver treats with a diet already high in organ meat or vitamin A supplements.
Sources and evidence notes (3)
Feeding Your Cat
Cornell Feline Health Center, Cornell University College of Veterinary Medicine — Feline nutrition fundamentals: cats are obligate carnivores; complete balanced cat food should be the diet base; treats should stay a small share of daily calories.
Petfoodology
Cummings School of Veterinary Medicine at Tufts University — Board-certified veterinary nutritionist guidance on pet diets, treat limits (about 10% of daily calories), human-food snacks, and species-appropriate feeding for cats and dogs.
Food Hazards
Merck Veterinary Manual — Veterinary toxicology reference section on human-food hazards in companion animals, including bread dough, chocolate, ethanol, grapes and raisins, macadamia nuts, xylitol, and Allium species.
Answer card
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Remove access. Take the food away and move your cat to another room.
Note the facts. What was it, roughly how much is missing, and when? Keep the packaging.
Call before symptoms. For chocolate, onion, garlic, grapes, raisins, alcohol, or anything sugar-free (xylitol), call a hotline or your veterinarian now — early treatment is easier and cheaper.
Never do this
Do not induce vomiting, feed milk, salt, or oil, or wait overnight to "see how it goes". Signs of chocolate or Allium poisoning can take hours to days to appear.
Go to an emergency vet immediately if
Your cat is collapsing, twitching or seizing, struggling to breathe, drooling heavily, vomiting repeatedly, or wobbly on their feet.
Outside the US? Call your local emergency veterinary clinic — keep the number saved in your phone.
Effective: July 17, 2026
Can Cats Eat It? provides general educational information for cat owners. It is not veterinary, diagnostic, treatment, or emergency advice.
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