Foods That Are Toxic to Dogs:
Updated: Aug 11
As dog owners, we often enjoy sharing food with our pets, but not everything that's safe for humans is safe for dogs. In fact, some everyday foods can cause severe illness, organ damage, or even become life-threatening if eaten by dogs.
Understanding which foods are dangerous is one of the simplest ways to protect your dog's health. This guide explains the most common toxic foods, why they're harmful, possible symptoms of poisoning, and what you should do if your dog accidentally eats something they shouldn't.
Important: If you suspect your dog has eaten a toxic food, contact your veterinary practice immediately. Do not wait for symptoms to appear, as early treatment often leads to a better outcome.
Contents
Why Some Foods Are Toxic to Dogs
Common Toxic Foods
Less Obvious Foods to Watch Out For
Signs of Food Poisoning
What to Do If Your Dog Eats Something Toxic
How to Prevent Accidental Poisoning
Frequently Asked Questions
Why Are Some Human Foods Toxic
to Dogs?
Dogs process certain foods differently from humans. Some ingredients contain compounds that dogs cannot break down effectively, while others can damage specific organs, affect the nervous system, or cause dangerous changes in blood sugar.
The severity of poisoning depends on several factors, including:
The type of food eaten
The amount consumed
Your dog's size and weight
Your dog's age
Any underlying health conditions
Even if a food seems harmless to us, it may still pose a serious risk to dogs.
Common Foods That Are Toxic to Dogs
Chocolate
Chocolate is one of the best-known dangers for dogs.
It contains theobromine and caffeine, both of which dogs metabolise much more slowly than humans.
Dark chocolate and baking chocolate generally contain higher levels of theobromine than milk chocolate, making them more dangerous.
Possible symptoms include:
Vomiting
Diarrhoea
Restlessness
Panting
Tremors
Increased heart rate
Seizures
Collapse
Even small amounts can be dangerous for small dogs.
Grapes and Raisins
Grapes, raisins, sultanas and currants can cause sudden kidney failure in some dogs.
Researchers still don't fully understand why some dogs are affected more severely than others, and there is no known safe amount.
Symptoms may include:
Vomiting
Lethargy
Loss of appetite
Increased thirst
Reduced urination
Weakness
Always treat grape ingestion as an emergency.
Onions, Garlic, Leeks and Chives
These belong to the Allium family.
Fresh, cooked, dried and powdered forms can all be harmful.
These foods can damage red blood cells, potentially leading to anaemia.
Symptoms may include:
Weakness
Pale gums
Rapid breathing
Lethargy
Collapse
Remember that onion and garlic powder are common ingredients in ready meals, soups, sauces and seasonings.
Xylitol (Birch Sugar)
Xylitol is an artificial sweetener found in many sugar-free products, including:
Chewing gum
Sweets
Some peanut butters
Toothpaste
Baked goods
Certain medications
In dogs, xylitol can trigger a rapid release of insulin, causing a sudden and dangerous drop in blood sugar. It may also damage the liver.
Symptoms can develop quickly and include:
Vomiting
Weakness
Tremors
Confusion
Collapse
Seizures
If you suspect your dog has consumed xylitol, seek emergency veterinary care immediately.
Alcohol
Alcohol affects dogs much more severely than humans.
Even small amounts can lead to:
Vomiting
Poor coordination
Low body temperature
Breathing difficulties
Coma
Never allow dogs access to alcoholic drinks or foods containing alcohol.
Caffeine
Caffeine is found in:
Coffee
Tea
Energy drinks
Cola
Some medications
It stimulates the nervous system and heart, potentially causing:
Hyperactivity
Restlessness
Tremors
Increased heart rate
Seizures
Macadamia Nuts
Macadamia nuts are particularly toxic to dogs.
Symptoms often develop within 12 hours and may include:
Weakness
Wobbliness
Vomiting
Tremors
Fever
Fortunately, many dogs recover well with prompt veterinary treatment.
Raw Bread Dough
Unbaked yeast dough continues to rise inside the stomach.
This can cause:
Painful bloating
Stomach expansion
Alcohol production during fermentation
Both effects can become life-threatening.
Cooked Bones
Although not chemically toxic, cooked bones are dangerous because they become brittle.
They may:
Splinter
Cause choking
Damage the mouth
Obstruct the digestive tract
Perforate the stomach or intestines
Choose dog-safe chews instead.
Mouldy Foods
Mould growing on food or compost can produce toxins that affect the nervous system.
Dogs that rummage through bins or compost heaps may be at risk.
Symptoms can include:
Tremors
Seizures
Vomiting
Elevated body temperature
Store food waste securely and keep compost inaccessible.
Less Obvious Foods to Be Careful With
Some foods are not always toxic but can still cause problems if fed inappropriately.
These include:
Avocado (especially the stone and skin, which pose choking and digestive hazards)
Fatty meat trimmings, which may increase the risk of digestive upset or pancreatitis
Corn cobs, which can cause intestinal blockages if swallowed
Fruit stones and pips, which present choking risks and may contain harmful compounds
Excessively salty foods, which can lead to salt toxicity in large amounts
Signs of Food Poisoning in Dogs
Symptoms vary depending on the substance eaten but may include:
Vomiting
Diarrhoea
Excessive drooling
Loss of appetite
Lethargy
Weakness
Tremors
Seizures
Difficulty breathing
Collapse
Pale gums
Increased thirst
Changes in urination
Some signs appear within minutes, while others may take several hours to develop.
What Should You Do If Your Dog Eats Something Toxic?
If you think your dog has eaten a dangerous food:
Stay calm and remove any remaining food.
Try to identify exactly what was eaten and, if possible, how much.
Check the packaging for ingredients if it was a prepared food.
Contact your veterinary practice immediately, even if your dog seems well.
Follow your vet's advice carefully.
Do not try to make your dog vomit unless a veterinary professional specifically instructs you to do so. In some situations, inducing vomiting can make matters worse.
How to Prevent Accidental Poisoning
Prevention is always better than treatment.
Simple steps include:
Store toxic foods in cupboards or high shelves.
Keep bins securely closed.
Remind children not to share snacks with pets.
Read ingredient labels before offering any human food.
Choose dog-safe treats instead of table scraps.
Check peanut butter and sugar-free products for xylitol.
Keep compost bins securely covered.
Frequently Asked Questions
Is a small amount of chocolate safe for dogs?
Not necessarily. The risk depends on the type of chocolate, the amount eaten and your dog's size. Dark chocolate and baking chocolate are more dangerous than milk chocolate. If your dog eats chocolate, contact your vet promptly.
Can dogs eat grapes if it's only one?
No. Because there's no known safe amount and individual dogs respond differently, any grape or raisin ingestion should be treated seriously.
Is garlic ever safe for dogs?
It's best to avoid feeding garlic. Even though small amounts may not cause immediate illness in every dog, regular or larger quantities can damage red blood cells.
What foods are safe instead?
Many plain foods can be offered occasionally, including cooked chicken, carrots, blueberries, apples (without seeds), pumpkin and plain cooked rice. See our Human Foods Dogs Can Safely Eat guide for a full list.
Can cooked bones be given as treats?
No. Cooked bones can splinter and cause choking, intestinal blockages or internal injuries. They should never be given to dogs.
Final Thoughts
Knowing which foods are toxic is one of the most important parts of responsible dog ownership. Many dangerous foods are common household items, which means accidental poisoning can happen more easily than people realise.
By keeping harmful foods out of reach, checking ingredients carefully and acting quickly if an accident happens, you can greatly reduce the risk to your dog.
When in doubt, it's always safer to contact your veterinary practice for advice rather than waiting to see if symptoms develop.
Visit our Amazon Storefront for a wide selection of dog products and great value essentials for your pets!
Related Content
Disclaimer
All content provided on this website, including blog posts, guides, social media content, and recommendations, is created for informational and educational purposes only and should not be considered veterinary, medical, or professional pet care advice. Always consult a qualified veterinarian or animal care professional before making decisions regarding your pet’s health, diet, or wellbeing. See Full T&C's here.
Comments