Can cats eat tomatoes?
Safe in moderationA small piece of ripe tomato flesh won't hurt a cat, but green tomatoes and the plant are toxic, so it's safest to skip them.
Reviewed by the Webvet Veterinarian Team · Last reviewed June 26, 2026
Can Cats Eat Tomatoes?
A small bite of ripe, red tomato flesh will not poison a cat, but green tomatoes, stems, and leaves are toxic, and since cats gain nothing nutritionally from tomatoes, the safest answer is to skip them. Ripe tomato is non-toxic in tiny amounts, yet it sits firmly in the "a taste, not nutrition" category for felines. Your cat is an obligate carnivore, built to run on meat, so a tomato is at best a novelty and at worst a trip to the vet if the wrong part is eaten. This guide explains exactly which parts are safe, which parts are dangerous, and why a lick of ripe flesh is the most you should ever offer.
- 1Ripe red tomato flesh is non-toxic to cats in tiny amounts, but it offers zero nutritional benefit.
- 2Green (unripe) tomatoes, plus the leaves, stems, and vines, contain solanine and are toxic.
- 3Cats are obligate carnivores, so tomato is a taste at most, never a food group.
- 4Never feed tomato sauce, ketchup, soup, or paste, which hide onion, garlic, and salt.
- 5If your cat eats the green plant, watch for stomach upset and call your vet.
Treats should stay under 10% of your cat's daily calories. Smalls makes the rest, built around the meat an obligate carnivore actually needs.
- Human-grade ingredients, protein first
- Built for obligate carnivores
- Fresh meals delivered to your door
Webvet may earn a commission when you click through to Smalls, at no extra cost to you.
Are Tomatoes Safe for Cats?
The honest answer is "sort of, but why bother." The ripe red flesh of a tomato is not toxic to cats, so if your cat licks a slice off your plate or steals a bite of a fresh tomato, there is no need to panic. What makes tomatoes tricky is that the same plant that gives you a harmless ripe fruit also produces genuinely poisonous parts, and the line between safe and dangerous comes down to ripeness and which piece your cat gets. A soft, deep-red, fully ripe tomato has broken down almost all of the natural toxin that unripe fruit carries, which is why a nibble is fine. The problem is that cats are curious, and a countertop tomato often comes attached to a stem, or sits next to a green one, or ends up in a sauce loaded with ingredients that are far more harmful than the tomato itself.
A soupy, lickable treat that sneaks in extra moisture, useful for cats that rarely drink enough.
Webvet may earn a commission when you click through to Chewy, at no extra cost to you.
It also helps to remember how small your cat is. A typical adult cat weighs only eight to ten pounds, so a portion that looks trivial to you is a large dose relative to their body. That is why every reputable source, including PetMD and the ASPCA, frames ripe tomato as an occasional curiosity rather than a treat you should actively offer. There is no version of a cat's diet that is improved by adding tomato, so the best mindset is simple: a lick will not hurt, but it is not something to encourage.
Why Cats Get Nothing Useful From Tomatoes
Dogs are omnivores and can pull some value from fruits and vegetables, but cats are a different animal entirely. As obligate carnivores, cats are hard-wired to get their protein, fat, and essential nutrients such as taurine directly from animal tissue. Their digestive system is short and built for meat, not for breaking down plant matter, and they lack the specific enzymes and metabolic pathways that would let them make good use of the vitamins in a tomato. The lycopene, vitamin C, and potassium that make tomatoes a healthy choice for people simply do not translate into a benefit for a cat.
Lickable chicken puree tubes designed to be a calm, hand-fed bonding treat.
Webvet may earn a commission when you click through to Chewy, at no extra cost to you.
There is another quirk worth knowing: cats cannot taste sweetness at all. They lack the receptor that lets mammals register sugar, so the mild sweet-tart flavor that draws people to a ripe tomato is invisible to them. When a cat does show interest in a tomato, it is usually the moisture, the texture, or plain curiosity about what you are eating rather than any real craving. Because tomato adds nothing to a complete cat diet, feeding it regularly only risks displacing the meat-based calories your cat actually needs, or upsetting a stomach that was never designed to process much produce in the first place.
The Real Danger: Green Tomatoes, Leaves, and Stems
The tomato belongs to the nightshade family, and like its relatives it produces solanine and a related compound called tomatine to defend itself from pests. These toxins are concentrated in the green, growing parts of the plant: the leaves, the stems, the vines, and unripe green fruit. As a tomato ripens and turns red, the level of these compounds in the fruit drops dramatically, which is why a ripe red tomato is safe while a green one is not. For a cat, eating a meaningful amount of green plant material can cause hypersalivation, vomiting, diarrhea, loss of appetite, lethargy, and in more serious cases weakness or an abnormal heart rate.
This matters most for households with a vegetable garden or a potted tomato plant on the windowsill. Cats are notorious nibblers of houseplants, and a tomato plant within reach is a genuine risk, not a theoretical one. If you grow tomatoes indoors or on a balcony your cat can access, treat the plant the way you would any toxic greenery and keep it well out of paw's reach. The ripe fruit you buy at the store, with any stem and leaf removed, is the only form of tomato that belongs anywhere near your cat.
What About Tomato Sauce, Ketchup, and Soup?
This is where a lot of cat owners get caught out. Even though ripe tomato flesh is harmless, processed tomato products are a different story, and they are far more common in the average kitchen than a plain fresh tomato. Pasta sauce, pizza sauce, tomato soup, ketchup, and tomato paste are typically loaded with onion and garlic, both of which are toxic to cats and, gram for gram, even more dangerous to felines than they are to dogs because cats' red blood cells are so easily damaged by allium compounds. On top of that, these products carry heavy salt and often added sugar, and cats are extremely sensitive to salt in their small bodies.
So the rule is simple: never let your cat have tomato sauce, ketchup, soup, or anything cooked with tomato and seasonings. A cat that licks a smear of pasta sauce off a plate has probably had a tiny dose, but if your cat eats a real amount of any onion or garlic containing food, that is a call to your vet, not a wait-and-see. The tomato is rarely the villain in these dishes, the ingredients cooked in alongside it are.
| Tomato form | Safe for cats? | Why |
|---|---|---|
| Ripe red flesh (plain) | In tiny amounts | Non-toxic once ripe, but no nutritional benefit |
| Green / unripe tomato | No | Contains solanine and tomatine |
| Leaves, stems, vines | No | Highest concentration of solanine in the plant |
| Tomato sauce / ketchup | No | Onion, garlic, salt, and sugar are the real danger |
| Tomato in cat food | Yes | Used in trace, processed amounts as a safe binder |
How Much Ripe Tomato Is Okay?
If your cat is clearly interested and you want to offer a taste, keep it genuinely tiny: a lick or a single bite-sized piece of plain, ripe, red flesh with the skin and any seeds is the ceiling, not a starting point. Wash the tomato first, cut away every trace of stem and leaf, and serve it plain with no salt, oil, or seasoning. Treats of any kind, tomato included, should never make up more than about ten percent of your cat's daily calories, and since tomato brings no nutrition to the table, there is no reason to get anywhere near that limit.
Introduce any new food one small piece at a time and watch for a day. Even the safe ripe flesh can cause mild stomach upset or loose stool in a cat that is not used to produce, and kittens, senior cats, and cats with existing digestive or kidney issues are best kept away from tomato entirely. If you see vomiting or diarrhea after a taste, skip it in the future. There is nothing your cat is missing out on.
Better Treats: Cat-Safe Protein Instead
Whole freeze-dried minnows, a single ingredient most cats find irresistible. Pure protein, zero filler.
Webvet may earn a commission when you click through to Chewy, at no extra cost to you.
Because your cat is a carnivore, the best treats are the ones that match how they are built to eat: small amounts of plain, cooked meat and fish. A few pieces of plain cooked chicken with no salt, oil, or seasoning make an ideal reward, and most cats will choose it over any fruit or vegetable every time. A little cooked egg, scrambled plain or hard-boiled, delivers real protein your cat can actually use, and a small flake of plain cooked fish is another treat cats genuinely enjoy, best kept occasional. A lick of plain meat baby food with no onion or garlic, or a proper commercial cat treat, rounds out the list of better options.
What to Do If Your Cat Eats a Green Tomato or the Plant
If your cat swallowed a bite of plain, ripe red tomato, you can relax and simply keep an eye out for mild stomach upset over the next day. The situation is different if your cat has eaten a green tomato, chewed on tomato leaves or a stem, or gotten into a plant in the garden. Watch closely for drooling, vomiting, diarrhea, a drop in appetite, lethargy, or any sign of weakness, and do not assume a cat that seems fine at first is in the clear. When in doubt, make the call.
Contact your veterinarian, the Pet Poison Helpline at 855-764-7661, or the ASPCA Animal Poison Control Center at 888-426-4435, and be ready to tell them roughly how much your cat ate and which part of the plant was involved. The good news is that most cats who nibble a little green plant material recover fully with prompt care, and serious solanine poisoning usually requires eating a fair amount. Acting quickly is always the safest choice for a small animal.
Frequently Asked Questions
Can cats eat raw tomatoes?
Only if the tomato is fully ripe and red, and only a tiny amount. Raw ripe flesh is non-toxic, but you must remove any stem and leaf and skip green, unripe tomatoes entirely, since those contain solanine.
Can cats eat cherry tomatoes?
A ripe red cherry tomato is treated the same as any ripe tomato, so a small bite is not toxic. Because cherry tomatoes are round and firm, cut one before offering it to reduce the choking risk, and never give a green one.
Why is there tomato in my cat's food?
Some commercial cat foods use tiny, processed amounts of ripe tomato or tomato pomace as a safe fiber source or binder. That is very different from feeding fresh tomato at home, and it is included at levels vetted to be safe for cats.
Is tomato sauce safe for cats?
No. Tomato sauce, ketchup, soup, and paste usually contain onion, garlic, salt, and sugar, all of which are harmful to cats. Onion and garlic are especially dangerous to felines, so keep all seasoned tomato products away from your cat.
My cat loves tomatoes. Is that a problem?
Some cats are drawn to the moisture and texture of ripe tomato, and an occasional tiny bite of plain red flesh will not hurt them. Just do not let it become a habit, keep the green plant out of reach, and offer a bit of plain cooked meat as a healthier reward.
The bottom line: a lick of ripe, red tomato flesh will not harm your cat, but tomato is never a food a cat needs, and the green parts of the plant are genuinely toxic. Keep tomato plants out of reach, never share seasoned tomato dishes, and when you want to treat your cat, choose a small piece of plain cooked meat, egg, or fish that actually fits their carnivore nature.
Sources
Reviewed by the Webvet Veterinarian Team
General guidance based on credible veterinary sources — not a diagnosis or a substitute for your veterinarian. If your pet ate something toxic or is unwell, contact your vet or a pet poison line right away.