PupkeeperToxicEmergency
Is lily of the valley toxic to dogs?
Highly toxic. Lily of the valley contains heart toxins that can cause an irregular heartbeat, seizures and coma.
If your dog ate or touched this, call your vet or a pet poison line now
United States
Poison lines in other countries: United Kingdom, Australia, Canada, New Zealand
What to do now
- Call your vet or a pet poison line now.
- Take any plant pieces away and rinse your dog's mouth with water.
- Bring a piece of the plant in a bag, or a photo, to help identify it.
- Get help even if your dog seems fine; signs can be delayed.
Don't
- Don't make your dog vomit unless a vet tells you to.
- Don't give milk, oil, salt or other home remedies unless a vet tells you to.
Signs to watch for
- Vomiting
- Irregular heartbeat
- Low blood pressure
- Disorientation
- Seizures
- Coma
When signs appear: Varies with the amount eaten
Why
It contains cardenolides, natural heart poisons that upset the heart's rhythm. Despite its name, it is not a true lily.
Sources
- ASPCA Animal Poison Control: Lily of the Valley
- Merck Veterinary Manual: Houseplants and Ornamentals Toxic to Animals
- Pet Poison Helpline: Toxic Plants to Pets (first aid)
Guide reviewed 9 October 2026.
General information from the sources above, not a diagnosis. When in doubt, call your vet.