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8 Human Foods You Didn't Know Were Highly Toxic to Cats

By Leslie Leon Parade Pets

Updated June 27, 2026 1:47 PM

arena photography — Paul Hanaoka / Unsplash

Cats are mischievous and sneaky creatures, and most of the time, that kind of behavior means you're in for funny moments and a little troublemaking. However, that sly nature also means you have to be wary of leaving food out on the table or counter. Your curious feline may try and steal a bite, but not all of the foods we eat as humans are cat-safe. In fact, some of them can actually be toxic to our furry friends.

Even when they don't look interested, cats have their eye on our food, and like any pet, they'll stop at nothing to sneak a bite. While there are certainly foods you can safely share with your cat, others are considered highly toxic to your feline friend. These toxic human foods could very well be sitting in your pantry or kitchen right now, making them easy targets for a curious cat at any time. Experts agree that foods toxic to cats should be stored out of reach, but as any cat parent knows, accidents may happen.

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Knowing exactly what to store and keep away from your cat's reach is the best way to protect your pet. These are the eight human foods veterinary experts say are toxic to cats. Know them so you can keep your cat healthy and safe.

Why Cats Can't Process Our Leftovers

It's not uncommon for cat parents to cave when their feline has them wrapped around their little paws (no shame in that). However, even when leftovers mean just a small bite, that still doesn't make them a safe option for cats because even a tiny taste can be toxic.

"The foods we eat contain a lot of different ingredients that don't always agree with a cat's digestive system," says Dr. Chyrle Bonk, a veterinarian at Embrace Pet Insurance. She adds that foods that are heavy in carbohydrates can be difficult for cats to digest, while other common ingredients found in your pantry or kitchen can be toxic because cats don't have the enzymes they need to break certain foods or ingredients down. Even foods that aren't considered highly toxic may still cause digestive issues for your cat, even in small amounts.

Why Cats Are Especially Vulnerable to Toxins

Cats may have a reputation for being independent and resilient, but their biology actually makes them quite susceptible to certain toxins.

"Cats have some unique metabolic characteristics that make them sensitive to certain compounds," says Dr. Joy Myers, a veterinarian on Vetster. "They are also meticulous groomers, which means substances on the skin or fur may eventually be ingested."

That said, Dr. Myers notes that cats tend to be more selective eaters than dogs. While a dog might rummage through the trash, your cat is far less likely to seek out food there or off the street, though that doesn't mean they won't find other ways to get into things they shouldn't.

Toxic Human Foods for Cats

These are the toxic human foods that can be harmful to your cat. Here's what to know to keep your feline friend healthy and safe.

Bones

Bones aren't toxic in the traditional sense, but they can still be very dangerous for cats. As Dr. Myers explains, cooked bones can fracture, cause choking, or lead to gastrointestinal obstruction or perforation. It's best to keep leftover or discarded bones well out of your cat's reach.

Grapes and Raisins

While the dangers of grapes and raisins are well documented in dogs, exactly how they affect cats is still being studied. Despite this, researchers have determined that they can still be dangerous.

"Nevertheless, ingestion should still be taken seriously because kidney injury has been reported in other species and the exact mechanism remains poorly understood," Dr. Myers says.

Though more research is needed, it's always best to steer on the side of caution and keep grapes and raisins safely locked away from your cat.

Raw Bread Dough

Unlike some of the other items on this list, raw bread dough can create direct toxicity inside your cat's body. Dr. Myers says that yeast dough can expand in their stomach while simultaneously producing alcohol through fermentation, both of which are extremely dangerous and toxic to cats.

Alcohol

As with the majority of pets, alcohol is a toxin to cats.

"Cats are sensitive to alcohol, and their small size puts them at risk with even small amounts," Dr. Myers says. "Beer, wine, liquor, raw bread dough and foods containing alcohol can cause profound neurologic depression, low blood sugar, respiratory failure and other serious complications."

To prevent accidents from happening, it's best to keep your alcoholic drinks covered or away from the reach of cats.

Chocolate and Caffeine

When it comes to anything containing chocolate or caffeine, your cat's sneakiness is your biggest concern. Dr. Myers says that chocolate, energy drinks, tea and supplements containing methylxanthines are highly toxic to cats and can trigger vomiting, diarrhea, abnormal heart rhythms, tremors, seizures and potentially life-threatening complications.

Onions, Garlic and Similar Plants

Anything from the allium family-such as onions, garlic, chives and leeks-should be kept far away from your feline friends. These plants and spices can damage red blood cells and cause anemia in cats, Dr. Myers says.

This applies not just to the whole foods themselves, but also to soups, gravies, seasoning packets, baby foods and table scraps that contain them as ingredients too.

Excessively Fatty Foods

While very delicious to humans, excessively fatty foods aren't the best human foods to keep around cats. "Fatty leftovers such as bacon grease, turkey skin or large amounts of table scraps are not necessarily 'toxic,' but they may trigger vomiting, diarrhea or pancreatitis in susceptible cats," Dr. Myers says. Just like with grapes and raisins, it's best to be cautious with these foods rather than risk any potential harm to your cat.

Products Containing Xylitol

Xylitol may not be a household name, but it's a common sugar substitute found in gums, mints, candies, baked goods and some peanut butters. While it's perhaps better known as a toxin for dogs, cats exposed to xylitol should still be evaluated by a veterinarian or poison control expert if they ingest a food item containing this sugar substitute.

The Early Warning Signs of Feline Toxicity

Many of the early warning signs of feline toxicity will depend on the type of toxin they consume. While some may have more visible symptoms, other symptoms may fly under the radar.

"Signs of toxicity will depend on what your cat ate, but may include drooling, vomiting, diarrhea, tremors, incoordination or lethargy," Dr. Bonk says.

Many of these symptoms may be confused for other medical issues, making it even more vital to keep a close watch on what your cat is consuming.

Why You Shouldn't Wait for Symptoms to Appear

Although the symptoms of toxicity might be your first sign that your cat has ingested something it shouldn't have, they might be appearing too late. Dr. Bonk says that by the time symptoms appear, it's typically too late to decontaminate their stomachs before it's fully absorbed into their system.

What to Do If Your Cat Eats Something Toxic (Hint: Act Fast)

Acting fast is the key to protecting your cat after eating something toxic. Instead of waiting to see if symptoms develop, Dr. Bonk suggests that you "contact your veterinarian or the Pet Poison Hotline immediately, even if you're unsure if it's toxic or not. They will direct you on what actions to take next depending on what your cat ate and when."

Our feline friends can be mischievous, but when it comes to food, a firm watch is your best protection. Not every toxic food contains life-threatening ingredients, but all of them can escalate into dangerous situations. When it comes to your cat's diet, it's always best to err on the side of caution and stick to foods developed specifically for cats.

This story was originally published June 27, 2026 at 1:22 PM.