PupkeeperToxic
Is mistletoe toxic to dogs?
Toxic. A few mistletoe leaves or berries usually cause stomach upset, but larger amounts can affect the heart and blood pressure.
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.
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
- Diarrhea
- Slow heart rate
- Trouble breathing
- Low blood pressure (rare)
Why
American mistletoe contains lectins and phoratoxins. All parts of the plant are considered toxic.
Sources
- ASPCA Animal Poison Control: Mistletoe (American)
- Pet Poison Helpline: Holiday Toxins
- 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.