Pet Poison Control Guide for Canadian Pet Owners
Pet poisoning is one of the most common reasons for emergency vet visits in Canada. The ASPCA Animal Poison Control Center handles over 400,000 cases per year across North America, and Canadian veterinarians report that poisoning accounts for roughly 10–15% of all emergency visits.
The good news: most pet poisonings are preventable. This guide covers the most common toxins Canadian pet owners encounter, how to recognize poisoning symptoms, and what to do if exposure happens.
What to Do If Your Pet Is Poisoned
Time is critical. Follow these steps immediately:
- Remove your pet from the source — move them away from the substance
- Do NOT induce vomiting unless specifically directed by a veterinarian. Some substances cause more damage coming back up
- Identify the toxin — save the packaging, take a photo, note how much was consumed and when
- Start a triage on PetEmergency.ca — get an instant urgency assessment and connect with the nearest on-call clinic
- Transport to an emergency vet if directed. Bring the packaging or a sample of the substance
Important: Do not give your pet milk, oil, salt water, or home remedies. These can worsen the situation.
Foods Toxic to Dogs
Highly Dangerous (Can Be Fatal)
| Food | Toxic Dose | Time to Symptoms | Danger |
|---|---|---|---|
| Chocolate (dark/baking) | 1 oz per kg body weight | 6–12 hours | Heart arrhythmia, seizures, death |
| Xylitol (birch sugar) | 0.1 g per kg | 15–30 minutes | Hypoglycemia, liver failure, death |
| Grapes and raisins | Any amount | 6–24 hours | Acute kidney failure |
| Macadamia nuts | 2.4 g per kg | 12 hours | Weakness, vomiting, hyperthermia |
| Onions and garlic | 15–30 g per kg | 1–5 days | Hemolytic anemia |
| Cannabis edibles | Any amount | 30–60 minutes | Ataxia, urinary incontinence, seizures |
| Alcohol | Varies | 30–60 minutes | Vomiting, disorientation, respiratory failure |
Cannabis: A Growing Problem in Canada
Since recreational cannabis was legalized in 2018, veterinary emergency clinics across Canada have reported a significant increase in cannabis toxicity cases in dogs. Edibles are the biggest risk — they're often high-dose, flavoured to be appealing, and left within reach.
Signs of cannabis toxicity in dogs:
- Stumbling and incoordination (ataxia)
- Dilated pupils with a glassy look
- Urinary incontinence
- Slow heart rate
- Tremors or seizures in severe cases
- Hypothermia
Most cases resolve with veterinary supportive care within 12–24 hours, but severe cases (high-dose edibles, small dogs) can be fatal. Don't wait for symptoms to worsen — start a triage immediately.
Moderately Dangerous
- Cooked bones — splintering risk, intestinal perforation
- Avocado — persin toxin causes vomiting, diarrhea
- Caffeine — similar effects to chocolate (theobromine cousin)
- Raw bread dough — yeast expands in stomach, produces alcohol
- Nutmeg — myristicin causes hallucinations, elevated heart rate
Foods Toxic to Cats
Cats are more sensitive than dogs to many substances due to their smaller size and different liver metabolism.
Highly Dangerous for Cats
- Lilies (all Lilium and Hemerocallis species) — the #1 cause of fatal plant poisoning in cats. Even small amounts of pollen licked from fur can cause kidney failure within 24–72 hours
- Onions, garlic, chives — cats are 3–5x more susceptible than dogs to allium toxicity
- Raw fish (thiaminase) — chronic feeding destroys vitamin B1, causing neurological damage
- Essential oils — tea tree, peppermint, citrus, eucalyptus. Cats lack the liver enzyme (glucuronyl transferase) to metabolize these. Diffusers in enclosed spaces are dangerous
- Paracetamol (acetaminophen / Tylenol) — a single regular-strength tablet can kill a cat
Household Chemicals
Common Canadian Household Poisons
Antifreeze (ethylene glycol) is the most dangerous household chemical for pets. It has a sweet taste that attracts animals, and as little as 1 tablespoon can kill a cat or a small dog.
- Peak risk: Fall and spring, during vehicle maintenance
- Early signs (30 min – 12 hrs): Appearing "drunk" — stumbling, vomiting, excessive thirst
- Late signs (12–72 hrs): Kidney failure, seizures, coma
- Treatment window: Must begin within 8–12 hours for dogs, 3 hours for cats
Look for pet-safe antifreeze containing propylene glycol instead of ethylene glycol.
Other Dangerous Chemicals
- Ice melt / road salt — causes paw burns and GI distress if licked. Wash paws after winter walks
- Rodent poison (rodenticides) — anticoagulant types may not show signs for 2–5 days. Bring the bait packaging to the vet
- Fertilizers and herbicides — keep pets off treated lawns for 24–48 hours
- Cleaning products — bleach, drain cleaners, laundry pods. Keep stored securely
- Toilet bowl cleaners — pets that drink from the toilet are at risk
Toxic Plants
Outdoor Plants Common in Ontario
| Plant | Toxic To | Dangerous Part | Symptoms |
|---|---|---|---|
| Lily of the Valley | Dogs and cats | All parts | Cardiac arrhythmia, vomiting |
| Sago Palm | Dogs and cats | Seeds (most toxic) | Liver failure, death |
| Foxglove | Dogs and cats | All parts | Heart failure |
| Rhubarb leaves | Dogs and cats | Leaves | Kidney failure |
| Wild mushrooms | Dogs and cats | Varies | Liver failure, seizures, death |
| Autumn Crocus | Dogs and cats | All parts | Multi-organ failure |
Indoor Plants
- Dieffenbachia (dumb cane) — mouth pain, drooling, difficulty swallowing
- Philodendron — oral irritation, vomiting
- Pothos — oral irritation, vomiting
- Aloe vera — vomiting, diarrhea, tremors
- Jade plant — vomiting, incoordination
- Tulip and daffodil bulbs — vomiting, diarrhea, cardiac issues if bulb is chewed
Medications
Human Medications Dangerous to Pets
Never give your pet human medication without veterinary direction.
- Ibuprofen (Advil) — kidney failure and GI ulceration in dogs and cats
- Acetaminophen (Tylenol) — liver failure in dogs, fatal in cats at any dose
- Antidepressants (SSRIs) — serotonin syndrome: agitation, tremors, seizures
- ADHD medications (amphetamines) — elevated heart rate, tremors, seizures, hyperthermia
- Blood pressure medications — severe drops in blood pressure, kidney failure
- Sleep aids (benzodiazepines) — severe sedation, respiratory depression
Veterinary Medication Overdoses
Even prescribed pet medications can be dangerous if overdosed:
- NSAID overdose (Metacam / meloxicam) — GI ulceration, kidney failure
- Flea/tick product misuse — permethrin products for dogs are fatal to cats. Never use a dog product on a cat
Poisoning by Season in Ontario
Spring
- Garden chemicals: fertilizers, herbicides, slug bait (metaldehyde — highly toxic)
- Spring bulbs: tulips, daffodils being planted or dug up by dogs
- Antifreeze during spring vehicle maintenance
Summer
- Blue-green algae (cyanobacteria) in Ontario lakes — fatal to dogs who swim in or drink affected water
- Toad toxicity — Bufo toads secrete toxins when mouthed by dogs
- Insecticides and wasp/hornet sprays
- Mushrooms in yards after rain
Fall
- Antifreeze — peak poisoning season
- Rodent poison — set out as mice move indoors
- Halloween chocolate and candy containing xylitol
- Fallen fruit (fermented fruit can cause alcohol toxicity)
Winter
- Antifreeze
- Ice melt products
- Carbon monoxide — from vehicles warming up in attached garages. Pets are affected before humans
- Poinsettia — mildly toxic (causes drooling, vomiting) but rarely serious
Pet Poison Hotlines in Canada
- ASPCA Animal Poison Control: 1-888-426-4435 (consultation fee applies, ~$95 USD)
- Pet Poison Helpline: 1-855-764-7661 (consultation fee applies, ~$85 USD)
- Your local emergency vet — start a triage on PetEmergency.ca for instant help
Prevention Checklist
- Store all medications in closed cabinets — not on countertops
- Use child-proof latches on cabinets with chemicals
- Choose pet-safe antifreeze (propylene glycol-based)
- Know which plants in your home and garden are toxic
- Keep cannabis products in locked, pet-proof containers
- Don't leave chocolate, grapes, or gum within reach
- Read labels on all flea/tick products — never use dog products on cats
- Wash your pet's paws after winter walks to remove ice melt
- Bookmark PetEmergency.ca/triage for instant help if exposure happens
If your pet has ingested any substance you're unsure about, don't wait for symptoms. Start a free triage on PetEmergency.ca now — it takes seconds and could save your pet's life.