Can Cats Eat Broccoli? Safe Serving, Florets and Gas
Broccoli is a nutritional powerhouse for people, and it often gets mentioned as a healthy treat for pets. Cats may nibble at the florets out of curiosity, and a taste is not dangerous. Still, it is more of a novelty for them than a useful food.
What broccoli contains
Broccoli is rich in vitamin C, vitamin K, folate, fiber and plant compounds such as sulforaphane. A cup of chopped florets has about 30 calories. Cats do not require these nutrients from plants, as they make vitamin C themselves and get other needs from animal tissue. Broccoli belongs to the cruciferous family, which contains isothiocyanates, compounds that can irritate the gut when eaten in quantity.
Quick reference
| Form | Verdict |
|---|---|
| Plain steamed florets, small pieces | Safe, occasional |
| Raw florets | Avoid, tough and harder to digest |
| Stalks | Avoid, fibrous and a choking risk |
| Broccoli with cheese sauce | Avoid, dairy and salt |
| Broccoli stir-fry or casserole | Avoid, garlic, onion, oil, soy sauce |
| Broccoli sprouts | Avoid, no benefit, bacteria risk |
| Broccoli soup | Avoid, onion, cream and salt |
How to serve broccoli
- Wash the broccoli well.
- Steam or boil florets without salt, butter or oil until soft.
- Let them cool and cut them into tiny pieces.
- Offer one or two small pieces, or mix a little into wet food.
- Do not repeat more than once or twice a week.
Most cats show little interest. Gas and loose stool are the most common problems, and they are more likely if the amount is large.
Why quantity matters
Isothiocyanates are protective for plants and some people, but in animals they can cause irritation. Veterinary sources generally consider broccoli safe if it makes up less than a small fraction of the diet, typically well under 10 percent of intake. For a cat, a couple of florets is already a lot. Anything more can cause nausea, gas, cramps or diarrhea.
Raw broccoli and stalks
Raw broccoli is hard to chew and swallow, and stalks are fibrous. A cat can choke on a chunk or end up with a blockage, particularly a small cat or a kitten. Always cook and chop, and keep stalks out of reach.
Seasoned and prepared broccoli
Broccoli is rarely served plain. Garlic, onion, soy sauce, oil, cheese and salt all appear in common recipes. Garlic and onion damage red blood cells, as explained in are onions and garlic toxic to cats. Cheese sauces add fat and lactose. See can cats eat cheese.
When to skip broccoli
- Cats with sensitive digestion. Gas and loose stool are more likely.
- Cats with thyroid disease. Cruciferous vegetables contain compounds that can affect the thyroid in large amounts, so ask your vet.
- Cats on prescription diets. Extras may interfere.
- Kittens. Use complete kitten food.
Signs of a problem
After a taste, watch for vomiting, diarrhea, gas, belly discomfort or loss of appetite. Mild signs usually pass in a day. Call your vet if they persist, or if the cat is lethargic. Our US vet directory can help you find a clinic, and the emergency warning signs guide lists red flags.
Myths about broccoli and cats
"Cats need vegetables to stay healthy." Cats are obligate carnivores, and complete cat food meets their nutritional needs.
"Broccoli prevents cancer in cats." There is no evidence for this in cats.
"Raw is better than cooked." For cats, cooked is easier to digest and safer.
Better ideas
For cats that like to chew greens, cat grass is a more suitable option. Plain cooked chicken is a better treat. Use the free cat food and plant safety checker for other foods, and ask your veterinarian if you are unsure.
Broccoli in the garden
If you grow broccoli, keep cats out of the vegetable beds. Plants may be sprayed with pesticides, and cats can dig in treated soil. Pick up fallen leaves, which can wilt and mold, and compost them in a closed bin. Cabbage family plants are not considered highly toxic to cats, but chewing plants can cause drooling and stomach upset.
Cruciferous cousins
Cauliflower, cabbage, Brussels sprouts and kale have similar properties. They are not toxic in small amounts, but they cause gas and offer little. Offer only plain cooked pieces, and stop if your cat shows discomfort.
Frozen and leftover broccoli
Frozen florets are fine if they are plain, thawed and cooked. Leftover cooked broccoli from a meal is usually seasoned, so do not share it. Refrigerate any plain portion and use it within two days.
Quick checklist
- Are the florets plain, steamed and cooled?
- Are they chopped tiny, with no stalk?
- Is the portion no more than one or two small pieces?
- Does your cat have a thyroid or digestive condition?
If you can answer yes to the first three and no to the last, a taste is fine.
Frequently asked questions
Is broccoli safe for cats?
Yes in small amounts of plain, cooked florets. Large amounts can cause stomach upset.
Can cats eat raw broccoli?
It is better to cook it. Raw broccoli is tough and may cause digestive upset or choking.
Is broccoli good for cats?
It is not harmful in small amounts, but it offers little that a complete cat food does not already provide.
What about broccoli sprouts?
Not toxic, but there is no benefit, and raw sprouts can carry bacteria.
Sources and further reading
Pet food rules and nutrient standards come from regulators and professional bodies. Start here when you want the primary source.
- Cornell Feline Health CenterFeline health information from Cornell University's College of Veterinary Medicine.
- ASPCA Animal Poison Control CenterToxic plants and foods lists, plus a 24-hour helpline.
- Pet Poison Helpline24-hour poison advice staffed by veterinary toxicologists.
Tailwisp is independent and written under our editorial policy. Learn who we are, or browse all cat guides.
This article is general educational information, not veterinary advice. Every cat is different. If your cat is unwell, or you are unsure about a symptom, diet change or medication, contact your veterinarian.