Every pet owner has been there — your dog gives you those irresistible puppy eyes while you're eating, or your cat jumps on the counter to investigate your dinner. But sharing your meal could be more dangerous than you think. Many everyday human foods are highly toxic to dogs and cats, and some can be fatal even in small amounts.
Here's what every Canadian pet owner needs to know.
🍫 1. Chocolate
Toxic to: Dogs and Cats
Danger level: ⚠️⚠️⚠️ HIGH
Chocolate contains theobromine and caffeine, both of which dogs and cats cannot metabolize effectively. Dark chocolate and baking chocolate are the most dangerous, but even milk chocolate can cause serious harm.
Symptoms: Vomiting, diarrhea, rapid breathing, muscle tremors, seizures, heart arrhythmia
What to do: Call your vet or the Pet Poison Helpline immediately — this is a medical emergency.
🧅 2. Onions, Garlic, Leeks & Chives
Toxic to: Dogs and Cats (cats are more sensitive)
Danger level: ⚠️⚠️⚠️ HIGH
All members of the Allium family — including onion powder, garlic powder, and cooked forms — cause oxidative damage to red blood cells, leading to hemolytic anemia. Even small amounts over time can accumulate to toxic levels.
Symptoms: Lethargy, pale gums, reduced appetite, weakness, reddish urine
What to do: Contact your vet — symptoms may be delayed 3-5 days after ingestion.
🍇 3. Grapes & Raisins
Toxic to: Dogs (and possibly cats)
Danger level: ⚠️⚠️⚠️ EXTREME — even small amounts can cause acute kidney failure
The exact toxic compound in grapes and raisins is still unknown, which makes this especially dangerous — there is no safe amount. Even a single grape has caused kidney failure in some dogs.
Symptoms: Vomiting, lethargy, loss of appetite, abdominal pain, decreased urination
What to do: Emergency vet visit immediately — do not wait for symptoms.
🥜 4. Xylitol (Artificial Sweetener)
Toxic to: Dogs primarily
Danger level: ⚠️⚠️⚠️ EXTREME
Xylitol is found in sugar-free gum, candy, peanut butter, baked goods, toothpaste, and some medications. It causes a rapid release of insulin in dogs, leading to life-threatening hypoglycemia (low blood sugar) and liver failure.
Always check labels — many "natural" peanut butters now contain xylitol.
Symptoms: Vomiting, loss of coordination, seizures, collapse within 30-60 minutes
What to do: Emergency vet immediately — this is one of the most rapidly fatal pet toxins.
🥑 5. Avocado
Toxic to: Dogs, Cats, Birds, Rabbits
Danger level: ⚠️⚠️ MODERATE
Avocado contains persin, a fungicidal toxin found in the fruit, pit, leaves, and skin. While humans are immune, it can cause vomiting and diarrhea in dogs and cats, and is particularly dangerous for birds and small animals.
Symptoms: Vomiting, diarrhea, difficulty breathing (in birds)
What to do: Contact your vet if a significant amount was consumed.
☕ 6. Caffeine (Coffee, Tea, Energy Drinks)
Toxic to: Dogs and Cats
Danger level: ⚠️⚠️⚠️ HIGH
Caffeine affects the nervous system and heart in pets similarly to theobromine in chocolate. Coffee grounds and tea bags are especially concentrated and dangerous.
Symptoms: Restlessness, rapid breathing, heart palpitations, muscle tremors, seizures
What to do: Contact your vet immediately.
🍺 7. Alcohol
Toxic to: Dogs and Cats
Danger level: ⚠️⚠️⚠️ HIGH
Pets are far more sensitive to alcohol than humans. Even small amounts of beer, wine, liquor, or foods containing alcohol can cause serious central nervous system depression.
Symptoms: Vomiting, disorientation, low blood sugar, low body temperature, breathing difficulty, coma
What to do: Emergency vet immediately.
🌰 8. Macadamia Nuts
Toxic to: Dogs
Danger level: ⚠️⚠️ MODERATE-HIGH
The toxic mechanism is unknown, but macadamia nuts cause a distinctive syndrome in dogs within 12 hours of ingestion.
Symptoms: Weakness (especially hind legs), vomiting, tremors, fever, lethargy
What to do: Contact your vet — most dogs recover with supportive care.
🍑 9. Fruit Pits & Apple Seeds
Toxic to: Dogs and Cats
Danger level: ⚠️⚠️ MODERATE
The pits of peaches, plums, cherries, and apricots — as well as apple seeds — contain cyanogenic compounds that release cyanide when chewed. The fruit flesh itself is generally safe in small amounts.
Symptoms: Dilated pupils, difficulty breathing, bright red gums, shock
What to do: Emergency vet if a large amount was consumed.
🧂 10. Salt & Salty Snacks
Toxic to: Dogs and Cats
Danger level: ⚠️⚠️ MODERATE
Large amounts of salt cause sodium ion poisoning in pets. Chips, pretzels, popcorn, and salty snacks should be kept away from pets.
Symptoms: Excessive thirst and urination, vomiting, diarrhea, tremors, seizures
What to do: Ensure access to fresh water and contact your vet if large amounts were consumed.
🥛 11. Dairy Products
Toxic to: Dogs and Cats
Danger level: ⚠️ LOW-MODERATE
Most adult pets are lactose intolerant. While not life-threatening, dairy products commonly cause digestive upset.
Symptoms: Diarrhea, vomiting, gas, bloating
What to do: Withhold dairy and monitor — usually resolves on its own.
🦴 12. Cooked Bones
Toxic to: Dogs and Cats
Danger level: ⚠️⚠️ MODERATE
Cooked bones (especially chicken and pork) become brittle and can splinter, causing internal lacerations, choking, or intestinal blockage.
Symptoms: Choking, gagging, bloody stool, abdominal pain, lethargy
What to do: Contact your vet if your pet has consumed cooked bones.
🚨 What to Do If Your Pet Eats Something Toxic
- Stay calm — panicking won't help your pet
- Call your vet immediately or go to the nearest emergency animal hospital
- Call the Pet Poison Helpline: 1-800-213-6680 (available 24/7 in Canada)
- Do NOT induce vomiting unless specifically instructed by a vet
- Bring the packaging of whatever your pet consumed to the vet
🐾 Keep Your Pet Safe & Healthy
Prevention is always better than treatment. Keep toxic foods secured, educate your family members, and always check ingredients before sharing food with your pet.
If your pet requires medication following a toxic ingestion or for ongoing health management, PetMedsToYourHome.Ca carries a full range of Health Canada-approved veterinary medications delivered across Canada.
👉 Shop Pet Medications | Upload Your Prescription | Contact Us
Disclaimer: This article is for informational purposes only and does not constitute veterinary advice. Always consult a licensed veterinarian for your pet's health concerns.
