Can Cats Eat Zucchini? Safety, Preparation and Portions

By Tailwisp Editorial TeamUpdated October 20, 20264 min read

Zucchini, also called courgette, is a staple of summer gardens. If your cat steals a nibble, you might wonder whether it is okay. For healthy cats, a small piece of plain zucchini is safe. As with all vegetables, though, it should be a small extra, not a meal.

Is zucchini toxic to cats?

No. Zucchini is not on the lists of plants that are poisonous to cats. It is mostly water, with some fiber, vitamin C, potassium and small amounts of other nutrients. Cats are obligate carnivores, which means they get what they need from meat. See how much protein do cats need.

A word about bitterness

Occasionally, zucchini and other cucurbits can contain high levels of cucurbitacins, natural compounds that taste very bitter and can cause stomach upset. This is rare in commercial zucchini, but can happen in garden plants grown from saved seeds. If zucchini tastes very bitter, throw it away, and do not feed it to your cat or yourself.

Cooked or raw

• Cooked. Steaming or boiling until soft makes it easy to digest. Cool, then cut into tiny pieces. Do not add butter, oil, salt or seasonings.
• Raw. A thin slice is not harmful, but raw vegetables are harder for cats to digest, and may cause gas.

How much?

A teaspoon or two for a typical adult cat is plenty. Keep all treats to under ten percent of daily calories. See healthy cat treats and cat calories in food explained.

Preparation

1. Wash and trim the ends.
2. Cut into small cubes, or mash.
3. Cook plain, without seasoning.
4. Cool completely.
5. Offer a small amount, and watch.

What to avoid

• Zucchini bread, fritters and cake. Contain sugar, fat, salt and sometimes raisins, nuts or chocolate. See are grapes and raisins toxic to cats and is chocolate toxic to cats.
• Dishes with onion or garlic. See are onions and garlic toxic to cats.
• Oils, butter and heavy sauces.
• Large pieces, which could cause choking.
• Pesticide residue. Wash well.

Potential benefits

• Hydration. A little extra water, though wet food is better. See wet vs dry cat food.
• Fiber. In small amounts it may support digestion.
• Low calorie. A harmless treat for cats that need to lose weight, if it is accepted. See how to help an overweight cat lose weight.

None of these benefits is large, so there is no need to feed zucchini unless your cat likes it.

Special situations

• Kidney disease. Zucchini has moderate potassium, and is low in phosphorus. Ask your vet. See kidney diets for cats.
• Diabetes. Low in carbohydrate, but still a small extra. See diabetic cat diet.
• Sensitive stomach. Introduce a very small amount, or avoid. See gastrointestinal cat diets.
• Food allergies. Vegetables rarely cause allergy, but any new food can. See cat food allergies and sensitive stomachs.

Other vegetables

See can cats eat green beans, can cats eat carrots, can cats eat peas and can cats eat pumpkin.

Gardens and plants

Zucchini plants are not toxic, but the garden has other hazards, such as fertilizers, slug bait and toxic plants. See cat friendly garden and yard.

Signs of trouble

Vomiting, diarrhea, drooling or lethargy after eating zucchini needs a vet, especially if the vegetable was bitter. See cat poisoning: what to do.

The bottom line

Plain, cooked zucchini is a safe occasional treat. Keep it small, plain and rare.

Growing zucchini with cats around

Gardeners often find cats digging in vegetable beds, which makes zucchini a common topic. The plants themselves are not toxic, but the large leaves and sprawling vines attract cats looking for shade, and the soil can be contaminated with fertilizer, slug pellets or compost that contains harmful scraps. Use cat-safe fertilizers, keep slug bait locked away and cover freshly turned soil with mesh or stones to discourage digging.

Wash home-grown zucchini as carefully as shop-bought fruit. If a plant produces fruit that tastes noticeably bitter, discard the whole thing and avoid saving seed from that plant. This is the same advice people receive for their own safety.

A note on portion sizes

Because cats are small, even tiny amounts of vegetable make up a significant share of a meal. A couple of cubes mixed into a normal portion of wet food is plenty. If you notice looser stool the next day, skip it in future. Most cats lose nothing nutritionally by never eating zucchini at all, so there is no pressure to keep offering it.

When to see a vet

See a vet if your cat has repeated stomach upset after trying new foods. Use the US vet directory to find a clinic.

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.