Cats may seem curious about everything on your plate, but some human foods can pose serious risks to their health. While a small taste might look harmless, certain ingredients can cause digestive issues, organ damage, or even poisoning.
Knowing which foods to avoid is one of the simplest ways to keep your cat healthy and safe at home. Here’s a look at some everyday items that should never make it into your feline’s bowl, and the reasons why they can be dangerous.
This article is for general informational purposes only and should not replace professional veterinary advice. Always consult a vet before introducing new foods to your cat’s diet. Images are for illustrative purposes only.
Chocolate And Caffeine

Both contain theobromine and caffeine, which can cause vomiting, seizures, or even heart problems in cats. Dark chocolate poses the greatest risk because it has higher concentrations of these compounds than milk chocolate.
Even a small bite can lead to restlessness, rapid breathing, and tremors. The darker and more bitter the chocolate, the more dangerous it becomes for your feline friend.
Keep all chocolate products securely stored away from curious paws. Coffee, tea, and energy drinks carry similar risks and should never be left unattended.
Onions And Garlic

Whether raw, cooked, or powdered, these break down red blood cells and can lead to anaemia. Garlic is particularly potent, with just a small amount causing damage over time.
Symptoms may not appear immediately but can include weakness, pale gums, and decreased appetite. Onion powder in baby food or seasoning mixes is especially sneaky since many pet owners don’t realize it’s there.
Avoid feeding table scraps that contain these ingredients. Check labels carefully, as garlic and onion appear in many processed foods meant for humans.
Grapes And Raisins

Even small amounts can trigger kidney failure in cats, leading to vomiting and lethargy. Scientists still don’t fully understand what makes these fruits so toxic, but the effects can be devastating.
Within hours of ingestion, your cat may become unusually quiet or refuse food entirely. Some cats develop severe kidney damage that requires emergency veterinary care.
Store grapes and raisins out of reach, and be mindful of baked goods containing them. Trail mix, fruit salads, and holiday treats often include these hidden dangers.
Dairy Products

Most adult cats are lactose intolerant, and milk or cheese can cause digestive upset and diarrhoea. Kittens produce lactase to digest their mother’s milk, but this enzyme decreases as they mature.
That classic image of a cat lapping up a saucer of milk is actually misleading. Dairy consumption often results in stomach cramps, gas, and messy litter boxes.
If your cat loves dairy, look for lactose-free treats designed specifically for felines. These products provide the creamy taste without the uncomfortable digestive consequences.
Raw Meat And Fish

Uncooked animal products can carry harmful bacteria like Salmonella, while raw fish can destroy essential nutrients. Raw fish contains an enzyme called thiaminase that breaks down thiamine, a vital B vitamin.
Chronic thiamine deficiency leads to neurological problems, including seizures and loss of appetite. Parasites in raw meat pose additional health risks that cooking eliminates.
Always cook meat and fish thoroughly before offering them to your cat. Properly prepared protein sources provide nutrition without the dangerous pathogens found in raw versions.
Raw Eggs

Uncooked eggs carry the risk of Salmonella and E. coli bacteria that can make cats seriously ill. Raw egg whites also contain avidin, a protein that interferes with biotin absorption.
Biotin deficiency affects skin health and coat quality over time. Cooking eggs destroys harmful bacteria and deactivates avidin, making them safe and nutritious.
Scrambled or hard-boiled eggs make excellent occasional treats when prepared without butter, salt, or seasonings. They provide high-quality protein that supports your cat’s muscle health and energy levels.
Bones And Fat Trimmings

Cooked bones splinter easily and can cause choking, intestinal blockages, or puncture internal organs. Fat trimmings from meat may seem like a tasty treat, but they often lead to pancreatitis.
Pancreatitis causes severe abdominal pain, vomiting, and potentially life-threatening complications. Cats lack the digestive enzymes needed to process large amounts of fat efficiently.
Dispose of bones and fatty scraps in secure garbage bins your cat cannot access. Offer lean, boneless meat in small portions if you want to share your meal safely.