10 Toxic Foods for Cats and Others to Avoid

In this article, we will explore foods that are harmful to your cat‚Äôs health. It is crucial to know which foods to avoid keeping your kitty healthy and happy. Proper nutrition is an essential part of cat care. Just like the saying goes, ‚Äúwe are what we eat.‚ÄĚ The same applies to our pets.

I especially notice this when changing brands of cat food. Their coat and overall appearance can change significantly. The same happens with the foods we have in the kitchen. There are certain foods that, while safe for humans, can be extremely dangerous for cats.

Cats have specific nutritional needs different from ours, so it’s quite logical that some foods can be toxic. In this article, we will review the main prohibited foods for cats and the reasons behind these risks. Additionally, at the end, you will find recommendations on how to handle situations where your cat might have ingested some of these dangerous foods. Let’s get started.

What Are the Forbidden Foods for Cats?

1. Chocolate

Chocolate contains theobromine, a compound that cats cannot metabolize properly. Ingesting chocolate can cause symptoms such as vomiting, diarrhea, irregular heart rhythm, tremors, and even death. Dark chocolate contains higher levels of theobromine compared to milk chocolate.

Recommendation: Keep all chocolate products out of your cat’s reach and ensure that children understand not to share their chocolate with the pet. If you suspect your cat has consumed chocolate, contact your veterinarian immediately.

2. Onions and Garlic

Onions and garlic contain compounds that can damage cats‚Äô red blood cells, causing anemia. Even in small amounts, these foods can be dangerous. Repeated consumption can lead to weakness, lethargy, and breathing difficulties‚Äč‚Äč.

Recommendation: Avoid giving any food containing onions or garlic, even in powder form, to your cat. This includes processed and prepared foods that often contain these ingredients in small amounts.

3. Grapes and Raisins

Consumption of grapes and raisins can lead to kidney failure in cats. Initial symptoms include vomiting and lethargy, which can develop into more serious issues such as decreased appetite, abdominal pain, and reduced urine production‚Äč.

Recommendation: Never offer grapes or raisins as treats and make sure they do not accidentally fall to the floor. Ensure all family members are aware of the risks these foods pose.

4. Alcohol

Alcohol has a much stronger effect on cats than on humans. Even a small amount can cause vomiting, diarrhea, coordination problems, respiratory difficulty, coma, and death. Fermented products like bread dough can also produce alcohol in your cat‚Äôs stomach‚Äč‚Äč.

Recommendation: Keep all alcoholic beverages out of your cat’s reach and clean up any spills immediately. Do not leave glasses with alcohol unattended.

5. Caffeine

Caffeine, found in coffee, tea, sodas, and some medications, can cause various dangerous symptoms in cats, such as hyperactivity, rapid heart rate, tremors, and seizures‚Äč.

Recommendation: Ensure your cat does not have access to caffeinated beverages or leftover coffee grounds or used tea bags. If your cat shows signs of caffeine poisoning, seek veterinary attention immediately.

6. Bones and Fish Bones

Small chicken bones and fish bones can splinter and cause obstructions or perforations in your cat‚Äôs digestive tract. Bones can also cause choking or damage their teeth‚Äč‚Äč.

Recommendation: Offer your cat only boneless meat and ensure any fish is free of bones. You can cook the meat and fish without seasoning to ensure your pet’s health.

7. Xylitol

Xylitol is a common sweetener in many sugar-free products such as gum and candies. In cats, it can cause a rapid release of insulin, leading to hypoglycemia (low blood sugar), seizures, and liver failure.

Recommendation: Check the ingredients of products before giving them to your cat and avoid anything containing xylitol. Be especially careful with household products that may contain this sweetener.

8. Avocado

Avocado contains persin, which can cause digestive problems, vomiting, and diarrhea in cats. All parts of the avocado, including the skin and pit, can be toxic‚Äč‚Äč.

Recommendation: Do not allow your cat to consume avocado or any part of the avocado plant. Keep avocados out of their reach and ensure the waste is disposed of properly.

9. Nuts

Nuts such as almonds, walnuts, and Brazil nuts can be dangerous due to their high-fat content and, in some cases, the presence of toxins. Macadamia nuts can cause weakness, depression, vomiting, tremors, and hyperthermia in cats. Additionally, nuts can cause obstructions in the digestive tract due to their size and hardness‚Äč.

Recommendation: Keep all nuts out of your cat’s reach and avoid including them in any food your cat might consume. Inform household members about the dangers of these nuts.

10. Dairy Products

Although cats may enjoy milk, many are lactose intolerant. Consuming dairy can cause stomach upset, diarrhea, and other digestive issues. Despite the common image of a cat drinking milk, it is not recommended‚Äč‚Äč.

Recommendation: Avoid giving milk and other dairy products to your cat. There are lactose-free milk options specially formulated for cats available in pet stores.

Other Foods to Avoid in Your Cat’s Diet

Sugar and Grains

Sugar and grains such as wheat, rice, or corn are not toxic to cats but can cause long-term health issues if consumed excessively. Sugar can contribute to obesity and dental problems, while grains can cause digestive issues and allergies in some cats‚Äč.

Recommendation: Limit the consumption of foods containing sugar and grains in your cat’s diet. Opt for cat-specific foods that contain appropriate ingredients for their nutritional needs.

Dog Food

Although it may seem similar, you should not feed cats dog food due to their different nutritional needs. Dog food lacks taurine, vitamin A, and arachidonic acid, essential for feline health. Additionally, it contains less protein and more carbohydrates, which is not suitable for cats, who are obligate carnivores. Feeding cats dog food can lead to severe deficiencies and long-term health problems‚Äč‚Äč.

Recommendation: Always opt for foods specifically formulated for cats to ensure proper nutrition and consult your veterinarian for any doubts about your pet’s diet.


Although not a food per se, several common plants can be toxic to cats. Some of the most dangerous plants include:

  • Lilies: All parts of the lily are highly toxic and can cause acute kidney failure.
  • Dieffenbachia (Dumb Cane): Can cause oral irritation, swelling, and difficulty swallowing.
  • Pothos: Can cause oral irritation, vomiting, and difficulty swallowing.
  • Aloe Vera: Can cause vomiting, lethargy, and diarrhea‚Äč‚Äč.

Recommendation: Keep these and other toxic plants out of your cat’s reach. If you have toxic plants at home, consider replacing them with pet-safe options.

What Should I Do If My Cat Eats Something Toxic?

If you suspect your cat has ingested something toxic, contact your veterinarian immediately. Do not attempt to induce vomiting without professional advice. Stay calm and follow the veterinarian’s instructions to ensure the best care for your pet. Here are some steps you can follow while waiting for veterinary help:

  1. Stay Calm: Cats can sense your stress, which can worsen the situation.
  2. Identify the Toxin: Try to determine what and how much your cat has ingested.
  3. Do Not Induce Vomiting: Unless your veterinarian specifically instructs you to do so.
  4. Provide Detailed Information: When speaking with the veterinarian, provide as much information as possible about what your cat has ingested.

Safe Alternative Foods for Cats

It is important to know that there are many safe foods you can offer your cat as treats or occasional supplements to their regular cat food diet. Some options include:

  • Cooked Chicken: Without bones or skin.
  • Fish: Cooked and boneless.
  • Eggs: Cooked, never raw.
  • Pumpkin: Cooked, without salt or seasoning.
  • Carrots: Cooked and in small quantities.


Protecting your cat from toxic foods is an essential part of responsible pet care. It is always best to provide foods specifically formulated for cats and consult your veterinarian if you have any doubts about the safety of certain foods. A homemade diet for cats is always possible, considering their nutritional needs and forbidden foods. Maintaining an adequate and safe diet will ensure that your cat has a long and healthy life.

Arsenio Coto
Arsenio Coto
Growth specialist, feline rookie. I write to learn and provide answers to the hundreds of questions I've had since Noa ūüźĪ became a part of my life.

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