30 Foods to Never Give Your Dog – And Why!

As a dog owner, it's essential to be aware of what foods can harm your beloved pet. While dogs may show a keen interest in our food, not everything we consume is safe for them. This comprehensive guide will explore 38 foods that are harmful to dogs, explaining what they are and why they pose a risk.

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Chocolate is a treat many humans love, but it's a dangerous food for dogs. Found in various forms around the house, from candy bars to baking chocolate, it poses a serious risk to your canine companion.

Chocolate contains theobromine, a compound that is toxic to dogs. Even in small amounts, it can cause vomiting, diarrhoea, and severe complications like heart problems. Darker chocolate has higher levels of theobromine and is even more dangerous.

Grapes and raisins might seem like a healthy snack, but they are surprisingly dangerous for dogs. Often stored in kitchens, they can be easily accessed by a curious dog.

These fruits can cause kidney failure in dogs. The exact toxic substance is unknown, but even small amounts can make your dog ill. Symptoms like vomiting and lethargy can occur within hours of ingestion.

Onions and garlic are common ingredients in many dishes, but they should never be shared with your dog. These kitchen staples can be harmful even in small quantities.

Onions and garlic can destroy a dog's red blood cells, leading to anaemia. This toxic effect is present whether raw, cooked, or powdered. Symptoms may not appear immediately, but they can be severe.

Avocado, a popular fruit in many human diets, is a no-go for dogs. While we might enjoy it in salads or on toast, it's unsafe for canine consumption.

The problem with avocados is persin, a substance that can cause vomiting and diarrhoea in dogs. The large seed also poses a choking hazard and can cause intestinal blockage if ingested.

Alcohol is a substance that should be kept away from dogs. Even small amounts in drinks or foods can be dangerous.

Alcohol can cause intoxication in dogs much quicker than in humans, leading to vomiting, disorientation, and, in severe cases, coma or death. It's important to keep all alcoholic beverages and foods containing alcohol out of reach.

Xylitol is a sugar substitute often found in sugar-free products such as gum and candy. While it's safe for human consumption, it's extremely toxic for dogs.

Xylitol can trigger a rapid release of insulin in dogs, leading to hypoglycemia (low blood sugar), which can be life-threatening. Symptoms include vomiting, weakness, and seizures.

Many rely on coffee for a morning pick-me-up, but caffeine is a big no for dogs. This includes coffee beans, grounds, and even tea.

Caffeine, like theobromine in chocolate, is highly toxic to dogs. It can cause hyperactivity, tremors, seizures, and heart problems. Even small amounts can be dangerous.

Macadamia nuts are often used in cookies and other baked goods, but they're one of the most poisonous foods for dogs.

Small amounts of macadamia nuts can cause symptoms like weakness, vomiting, and hyperthermia in dogs. The exact reason for their toxicity is unknown, but they should be avoided at all costs.

Yeast dough, used for making bread and pastries, can be a hidden danger in the kitchen. While it's safe for humans once cooked, it's hazardous for dogs in its raw form.

When ingested, yeast dough can rise in a dog's stomach, causing bloating and severe pain. Additionally, the fermentation process produces alcohol, which can lead to alcohol poisoning.

Bones, especially cooked bones, are commonly considered a good treat for dogs. However, they can be very dangerous.

Cooked bones can splinter easily, causing choking or damaging your dog's intestines. Even uncooked bones, while less likely to splinter, can pose a risk of blockage or injury.

Milk and dairy products might seem harmless, but they can be problematic for dogs. While the occasional small amount may not be harmful, regular consumption can lead to issues.

Many dogs are lactose intolerant, meaning they can't properly digest lactose found in milk. This can lead to gastrointestinal upset, including diarrhoea and vomiting.

Excessive salt intake is not just a human health concern; it also affects dogs. While a little salt is necessary in a dog's diet, too much can be harmful.

Too much salt can lead to sodium ion poisoning in dogs. Symptoms include excessive thirst, urination, vomiting, and, in severe cases, seizures and death.

Raw eggs might be a health trend for humans, but they should be avoided in a dog's diet.

Raw eggs can contain bacteria like Salmonella and E. coli, which can cause food poisoning. Also, raw egg whites contain avidin, an enzyme that decreases the absorption of biotin (a B vitamin), which can lead to skin and coat issues.

Raw feeding is a popular trend, but raw meat and fish can be dangerous for dogs if not handled correctly.

Raw meat and fish can contain bacteria and parasites that cause food poisoning. Certain types of fish, such as salmon, can also contain a parasite that causes "salmon poisoning disease," which can be fatal if not treated. Our Raw Feeding for Dogs and Cats Diploma Course can ensure you’re feeding your pets safely.

Candy, gum, and other sweet treats are often enticing to dogs but can contain harmful ingredients.

Apart from the already mentioned xylitol, sweets can cause tooth decay and obesity in dogs. They often contain high sugar levels and sometimes caffeine, which is also harmful.

Fat trimmings from cooked and uncooked meat might seem like a tasty treat for your dog, but they can be dangerous.

Fat trimmings can cause pancreatitis in dogs, a condition where the pancreas becomes inflamed. Symptoms include vomiting, abdominal pain, and diarrhoea.

While fruits like persimmons, peaches, and plums can be healthy for humans, they're not safe for dogs.

The seeds or pits from these fruits can cause intestinal blockage. Moreover, the pits contain cyanide, which is poisonous to both humans and dogs, but dogs may not know how to avoid them.

Human vitamins and supplements should never be given to dogs, especially those that contain iron.

Vitamins formulated for humans can contain concentrations of vitamins and minerals that are too high for dogs, potentially leading to vitamin toxicity. Iron can also damage a dog's digestive system lining and be toxic to other organs.

While liver can be a healthy treat in small amounts, excessive consumption is not recommended for dogs.

In large amounts, liver can cause vitamin A toxicity, which affects a dog's muscles and bones. Symptoms include deformed bones, excessive bone growth on the elbows and spine, and weight loss.

Nutmeg, a common spice used in baking, is toxic to dogs and should be kept well out of their reach.

Nutmeg contains myristicin, a compound that can cause seizures and central nervous system problems in dogs. Symptoms of nutmeg poisoning include disorientation, increased heart rate, high blood pressure, and seizures.

Corn on the cob might seem harmless, but it poses a significant risk to dogs. While corn itself is not toxic, the cob can be problematic.

The cob can cause a choking hazard or intestinal blockage if ingested. Unlike corn, which is digestible, the cob does not break down in a dog's stomach.

Citrus fruits like oranges, lemons, and grapefruits are known for their vitamin C content but are not ideal for dogs.

The citric acid in these fruits can cause stomach upset in dogs, especially if consumed in large amounts. The oils and compounds in the skin can also be harmful.

Certain types of mushrooms, especially wild mushrooms, can be toxic to dogs.

While some mushrooms are safe, others can be highly toxic, causing various symptoms, from gastrointestinal upset to severe organ failure and even death. It's best to prevent dogs from eating any mushrooms.

Ice cream is a favourite among humans, especially during warmer weather, but it's not a suitable treat for dogs.

Most dogs are lactose intolerant and cannot digest dairy products properly. Ice cream can cause digestive upset, including diarrhoea and vomiting.

Fruit pits and seeds from cherries, apricots, and apples can be hazardous for dogs.

These pits and seeds can cause intestinal blockage. Additionally, many contain cyanide, a toxic substance for both humans and dogs, but it is particularly dangerous for dogs who may not avoid them.

Raw potatoes, part of the nightshade family, contain solanine, which is toxic to dogs.

Solanine can cause gastrointestinal upset and, in larger amounts, can lead to more severe symptoms like heart problems, breathing difficulties, and neurological issues.

Hops, used in home brewing, are extremely poisonous to dogs.

Ingestion of hops can cause a rapid increase in temperature, restlessness, and vomiting and can potentially lead to death. It is a lesser-known but very serious risk in homes that brew beer.

With its distinctive flavour and mould, blue cheese is a favourite for some cheese enthusiasts, but it's unsuitable for dogs.

The mould in blue cheese can produce roquefortine C, which can be toxic to dogs. Consumption can lead to vomiting, diarrhoea, and more severe symptoms like high temperatures and seizures.

Bacon and other fatty meats are often considered tasty treats for dogs, but their high-fat content makes them unsuitable.

High-fat foods like bacon can cause pancreatitis in dogs, leading to digestive problems and abdominal pain. Regular consumption can also lead to obesity and related health issues.

Tuna, a common fish in human diets, can be risky for dogs, especially when fed in large amounts.

Tuna is high in mercury, which can be harmful to both humans and dogs in large quantities. It can lead to mercury poisoning, affecting the dog's nervous system.

If your dog has eaten something toxic, acting quickly and calmly is important. Here's a step-by-step guide on what to do:

Remember, time is of the essence when it comes to potential poisoning. Quick and appropriate action can make a significant difference in the outcome for your pet.

When choosing dog food, it's important to be aware of harmful ingredients lurking within. Some common harmful ingredients include:

As a dog owner, understanding what foods can harm your pet is vital for their health and wellbeing. Educating yourself about canine nutrition is a step forward in ensuring your dog's safety and happiness.

If you want to deepen your understanding of canine nutrition, why not explore our Canine Nutrition Diploma Course? This is an incredible opportunity to gain expert knowledge and skills, helping you to make the best dietary choices for your beloved pet. For a limited time, we're offering this comprehensive course at a discounted price of just £29!