Skip to main content

Can cats eat tomatoes? 5 common foods you should avoid feeding your pet

We’ve all been there: you’re enjoying your dinner when your cat appears beside you, begging for a bite of what’s on your plate. While the food might be nutritious for you, certain human foods can be highly toxic to cats. It’s best to avoid feeding your cat from your plate to be safe, but if you do want to share a bit of food from your kitchen with your cat, double-check first to make sure that what you’re feeding isn’t toxic. And, if your cat ever helps himself to some treats from your plate, you’ll need to know whether you’re dealing with a veterinary emergency so you can take the right steps. Can cats eat tomatoes, and what about other common foods in your kitchen? Some of the answers may surprise you.

Can cats have tomatoes?

The answer here is, it depends. According to the ASPCA, tomato plants, including the fruit, are toxic to cats (and dogs and horses) when they’re not ripe. Ingesting the plant or the fruit could lead to loss of appetite, a severely upset digestive system, excessive salivation, depression, weakness, dilated pupils, and a slow heart rate. Interestingly, when the tomato is ripe, it is non-toxic to cats.

Cat sitting and eating a treat
Image used with permission by copyright holder

Are cooked tomatoes safe for cats?

Potentially. Presuming that the cooked tomatoes were ripe, they’re not necessarily toxic, but it’s important to consider if other foods were added to the cooked tomatoes, like when making a pasta sauce. The ASPCA notes that salt can lead to problems like excessive thirst and urination. In extreme cases, cats who ate too much salt might experience vomiting, diarrhea, depression, seizures, and potentially death.

Other common ingredients, like onions and garlic, can also cause digestive upset. They can cause damage to your cat’s red blood cells and even anemia.

Cat climbing up onto a picnic table filled with food
felix_w / Pixabay

What other foods are toxic to cats?

According to PetsMD, there are many other foods that are toxic to cats. Some of these foods are commonly found in your kitchen, so it’s important to know their risks and keep them away from your cat.

Alcohol

Alcohol of any sort is dangerous to your cat. Just like alcohol affects our livers and brains, it can affect your cat’s liver and brain. Unfortunately, cats need to digest only minimal amounts of alcohol to withstand serious damage, and two teaspoons of whiskey are enough to put a five-pound cat into a coma. Higher-proof alcohols are even more dangerous, so keep all alcoholic beverages well away from your cat.

Yeast

Yeast dough swells as it rises, and if your cat ingests raw dough, it will swell in your cat’s abdomen. The fermenting yeast can also produce alcohol, leading to potential alcohol poisoning. If your cat has ingested enough yeast to produce substantial alcohol, that alcohol poisoning can lead to a coma or death.

Caffeine

Caffeine in larger amounts can also be fatal for your cat, and caffeine is in all sorts of foods like coffee, tea, chocolate, and stimulant drinks. Caffeine poisoning can cause rapid breathing, heart palpitations, and muscle tremors, and you might notice that your cat is unusually restless. Unfortunately, there is no treatment for caffeine poisoning.

Xylitol

It’s also important to be aware of the dangers of xylitol. According to the ASPCA, xylitol is a sweetener that you’ll find in many common products like candy, toothpaste, and gum. Xylitol is extremely dangerous because it can cause your cat to release insulin, which then lowers his blood sugar levels. That can lead to liver failure. You might notice your cat vomiting, losing coordination, and becoming unusually lethargic. He might also experience seizures.

If your cat ingests any of these foods, it’s important to consult with a veterinarian right away. Call your regular vet’s office for help, but if it’s after hours or on the weekend, you may need to contact your local emergency veterinary hospital. Try to be prepared with the specific food your cat ingested, including the product label if it was a packaged product. Provide an estimate of how much of the food your cat ate, when he ate it, and any symptoms that you’re seeing. It’s also important to share any health issues your cat has, as well as his age and weight. Getting your cat help right away might save his life, but it’s important to act quickly in these emergencies.

Paige Cerulli
Former Digital Trends Contributor
Paige's work has appeared in American Veterinarian, Business Insider, Healthline, and more. When she's not writing, Paige…
This is why cats pee on clothes (and how you can save your wardrobe in the future)
Why your cat is displaying this nasty behavior and what to do next
A long-haired cat in a woven laundry basket

Cats have many reputations — for plotting your demise (probably not), destroying the holiday trees (fair), and night owl behavior (they can't help themselves). However, cats are also known for being good about using the correct facility. Their instinct to go in one gives kitties a point over dogs, which are generally more difficult to housebreak in cat lovers' books.

Yet, your cat is suddenly peeing on your clothes.
"Why does my cat pee on my clothes?" you ask. That's a good question, and the answer is critical to uncover. Here's why: Peeing outside of the litter box is a sign that something is up, especially if the cat usually uses one like a pro. So, what's up with kitty when they're peeing on your laundry? They're not trying to spite you, but instead, to send you a rather gross but important message. Here's what a cat is saying when they choose your favorite shirt over their box.

Read more
Why do cats’ eyes dilate? What your pet’s extra big peepers mean
Your cat might have big eyes because of darkness, excitement, or surprise
A cat snuggling on a person's chest

Sometimes you come home to a dark house, and through the pitch black of your living room, you spy two big round orbs. While it might look Halloweeny at first glance, this is actually just how your cat sees things. Cat's eyes seem to glow at night because they reflect light, a lot more than ours do in any case. Just as with other animals, you will see a kitty's eyes dilate, but what is your cat's pupils meaning? We'll walk through what your pet's eyes tell you about their feelings and physical state and when you need to step in and get your cat to a vet.
What does it mean when cats' pupils get big?

Big eyes on your cat could mean a few different things, some physical and some emotional. Rarely, you may find that your cat has a larger issue since occasionally dilated pupils can be medical in nature (we'll go into this more later). Fortunately, it generally doesn't have to do with any underlying condition and instead has everything to do with the current situation. Here are some reasons your cat might have extra large peepers.
They're hunting
Cats love to hunt and frequently do so at dawn and dusk — both inside your home and out of it. Your pet might not literally be hunting for prey, but they could still enjoy stalking their toys or food. When they're in hunting mode, you may see extra big eyeballs staring at the object of their interest.
It's dark outside
When you spend time in a dark room or outside at night, you'll almost certainly notice your own pupils get bigger. That's because our eyes open up to let in more light and allow us to see better. It's the same with your cat but theirs tend to stand out a bit more in part because of the prior mentioned reflectivity.
Something surprised them
If you've ever heard of eyes widening with surprise, this is what we're talking about. From a physical perspective, your globes are attempting to take in everything as quickly as possible, because this surprise could mean a bad thing. A wild cat could get startled by a predator for example and need that info to find a way to safety.
They feel anxious
You may discover that your cat has eyes that seem to dilate under certain conditions or more frequently than usual. It might mean they're experiencing some anxiety and want to destress. Ensure there is somewhere in your house where they feel secure and that the day-to-day routine suits their needs.
They're aggressive
Sometimes you might see your cat's eyes turn to slits before they get into a fight with another cat because narrowing the opening can help them protect their sensitive ocular region. On the other hand, having wide-open eyes gives your feline more information about their opponent. Pay attention to other signs of aggression, which will help you determine if this is causing the widening.
When do dilated pupils indicate a medical issue?

Read more
These useful tips can help you support your senior cat’s health
You'll have to pay special attention as your kitty gets older
Senior cat sleeping on a cat tree perch

If you're fortunate, you'll get to watch your cat age and progress through her senior years. But senior cats have different health needs than younger ones do, so the way you care for your aging cat will need to change in different ways, as well.
With certain health conditions becoming more likely in older kitties, staying on top of your cat's wellness becomes extra important. This may mean some additional time and vigilance, as well as more frequent trips to the vet. When you provide your pet with top-quality care, you can support her health and comfort as she moves through her golden years.

At what age is a cat a senior?

Read more