Why this verdict for dogs
American mistletoe can cause stomach upset, a drop in blood pressure and, with larger amounts, heart problems and collapse. Keep holiday sprigs up high.
Warning signs to watch for
- Vomiting & diarrhea
- Drooling
- Weakness
- Abnormal heart rate
⚠ If your dog ate mistletoe
Act immediately — don't wait for symptoms.
- Call your vet or a pet poison helpline right away.
- Note how much was eaten and when.
- Do not induce vomiting unless a professional tells you to.
Poisoning emergencies are expensive
A single toxicity visit can cost hundreds. Compare pet insurance plans that cover accidents and poisoning.
Frequently asked questions
Can dogs eat mistletoe?
No. American mistletoe can cause stomach upset, a drop in blood pressure and, with larger amounts, heart problems and collapse. Keep holiday sprigs up high.
How much mistletoe can dogs have?
None — mistletoe is not safe for dogs and should be avoided entirely. When in doubt, ask your vet.
Is mistletoe safe for cats too?
Verdicts can differ between species. See the cat answer for mistletoe →
More plants for dogs
By the CanMyPet Editorial Team · Reviewed against ASPCA Animal Poison Control, the American Kennel Club (AKC) and Pet Poison Helpline · Last updated June 2026.
Sources
- ASPCA — People Foods to Avoid Feeding Your Pets
- American Kennel Club — Dog Nutrition
- Pet Poison Helpline — Poison List