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Writer's pictureMy Purrfect Cats

What Cats Cannot Eat

Cats, with their discerning taste buds and curious nature, may often express interest in various foods. While sharing a nibble with your feline friend might seem tempting, it's crucial to be aware that some human foods can be toxic and harmful to cats. In this extensive guide, we will delve into the realm of what cats cannot eat, exploring the dangers, potential health risks, and providing a comprehensive list to keep your furry companion safe.

cat eating

I. Understanding Feline Dietary Requirements

Before diving into the list of foods that are harmful to cats, it's essential to comprehend the unique dietary needs of these obligate carnivores. Cats have specific nutritional requirements that differ from those of humans and even some other animals.


  • Obligate Carnivores: Cats are obligate carnivores, meaning their diet primarily consists of meat. Unlike omnivores, they lack the necessary enzymes to digest certain plant-based foods efficiently.

  • Protein Requirements: Protein is a crucial component of a cat's diet, providing essential amino acids necessary for various bodily functions. Lack of adequate protein can lead to health issues.

  • Limited Carbohydrate Tolerance: Cats have a limited capacity to digest carbohydrates. High-carb diets are not suitable for them and may contribute to obesity and diabetes.

cat eating

II. Foods that Cats Cannot Eat: A Comprehensive List

  • Chocolate: Contains theobromine, which is toxic to cats and can cause vomiting, diarrhea, increased heart rate, and even death.

  • Onions and Garlic:

  • Contain compounds that can damage a cat's red blood cells, leading to anemia.

  • Alcohol: Even small amounts can cause intoxication, depression of the central nervous system, and damage to internal organs.

  • Caffeine: Found in coffee, tea, and some sodas, caffeine can lead to restlessness, rapid breathing, and heart palpitations in cats.

  • Grapes and Raisins: Can cause kidney failure in cats, with symptoms including lethargy, vomiting, and decreased appetite.

  • Xylitol (Artificial Sweetener): Found in sugar-free gum, candy, and certain baked goods, xylitol can lead to insulin release, causing hypoglycemia (low blood sugar) in cats.

  • Dairy (in Lactose-Intolerant Cats): Many adult cats are lactose intolerant, and feeding them dairy can lead to digestive upset, including diarrhea.

  • Bones: Cooked bones can splinter and cause choking or puncture internal organs. Raw bones should be given cautiously, as they may still pose risks.

  • Fat Trimmings and Bones from Cooked Meat: Can cause pancreatitis and gastrointestinal blockages.

  • Tuna (as a Primary Diet): Feeding cats exclusively with tuna can lead to nutrient deficiencies, particularly in essential vitamins like Vitamin E.

  • Raw Eggs: Contain avidin, which can interfere with the absorption of biotin, leading to skin and coat issues.

  • Certain Nuts: Macadamia nuts and certain other nuts can cause weakness, tremors, and hyperthermia in cats.

  • Salt and Salty Foods: Excessive salt intake can lead to electrolyte imbalances and, in severe cases, sodium ion poisoning.

  • Alcohol-Based Foods: Foods cooked with alcohol can retain some of the alcohol content, posing a risk of toxicity to cats.

  • Certain Medications: Some human medications, such as acetaminophen (Tylenol) and ibuprofen, can be lethal to cats.

cat eating

III. Signs of Poisoning in Cats

It's crucial to be vigilant for signs of poisoning if you suspect your cat has ingested something harmful. Common symptoms include:


  • Vomiting

  • Diarrhea

  • Lethargy

  • Loss of appetite

  • Difficulty breathing

  • Tremors or seizures


If you observe any of these signs, seek immediate veterinary attention.

cat eating

IV. Safe Alternatives and Healthy Treats

While there is a list of foods that cats cannot eat, there are plenty of safe and healthy alternatives to treat your feline friend:


  • Catnip: Many cats enjoy the effects of catnip, which is safe in moderation.

  • Commercial Cat Treats: Choose treats specifically formulated for cats, ensuring they meet their nutritional needs.

  • Cooked Meat: Plain, cooked meat without seasoning or bones can be a tasty and safe treat for cats.

  • Commercial Catnip Toys: Toys infused with catnip can provide entertainment and pleasure without any harm.

  • Cat Grass: Cat grass is a safe and natural option that provides fiber and aids in digestion.

cat eating grass

V. Conclusion

Being a responsible and informed cat owner involves understanding what cats cannot eat and ensuring their safety by keeping harmful foods out of reach. By prioritizing your cat's unique dietary requirements and steering clear of toxic substances, you contribute to their overall health and well-being. Remember, when in doubt, consult with your veterinarian to make informed decisions about your cat's diet and nutrition.


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