Dogs
Potentially toxicConsulted references classify the plant as toxic or irritating for that pet type.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Sources
dog safety reference
Is American Mistletoe safe for dogs?
Phoradendron flavescens
American Mistletoe is a hemiparasitic shrub often used in holiday decor that contains compounds capable of causing significant gastrointestinal and cardiovascular distress if ingested. Due to the potential for serious health complications, it should be kept strictly out of reach of all pets.
American MistletoeOak MistletoePhoradendron flavescensPhoradendron leucarpum
- Light
- Bright indirect light
- Habit
- Parasitic shrub
- Care
- High (requires host plant)
Safety status
What this means for your dog
Dogs that snatch fallen mistletoe berries or chew sprigs from a wreath typically develop stomach upset from phoratoxins and lectins. Most cases stay mild and GI-only, but a dog that eats a large amount can develop heart-rhythm changes, low blood pressure, or neurologic signs that need emergency care.
What to watch for
Drooling, vomiting, diarrhea, and abdominal pain are the usual signs and tend to start within a few hours. Larger ingestions can cause ataxia (walking like drunk), a slow or irregular heart rate, low blood pressure, labored breathing, seizures, or collapse.
Time window
Mild GI signs typically begin within a few hours of ingestion. Severe signs from larger ingestions can come on quickly. Most mild cases resolve in 24–48 hours with supportive care.
When to call the vet
Call your vet or ASPCA Animal Poison Control at (888) 426-4435 right away if your dog ate berries or leafy parts. Cardiac signs, weakness, seizures, or collapse are a true emergency — head to a 24-hour clinic.
Sources: ASPCA, Pet Poison Helpline.
If a pet has chewed or swallowed plant material and is showing symptoms, contact a veterinarian or poison resource immediately. This product is for structured reference, not diagnosis.
Dogs — concern notes
Common signs
Vomiting, diarrhea, lethargy, drooling, and potential cardiovascular changes such as bradycardia or hypotension.
Escalation note
The berries and leaves are considered toxic; seek veterinary attention promptly if ingestion occurs to manage symptoms and prevent complications.
Safer alternatives
No hand-picked alternatives for this plant yet. You can still pick your own using the Compare button on any other plant.
Source evidence
ASPCA Toxic Plant List
toxicology · 99% reliability
American Mistletoe is listed as toxic to both cats and dogs, causing gastrointestinal and cardiovascular symptoms.
NC State Extension Plant Toolbox
botanical · 94% reliability
Phoradendron leucarpum, commonly known as American Mistletoe, is a parasitic plant that is toxic if ingested.
Questions about American Mistletoe
Is American Mistletoe toxic to dogs?
Yes, American Mistletoe (Phoradendron flavescens) is toxic to dogs. Both the berries and leaves contain compounds that can cause gastrointestinal and cardiovascular distress, making it a plant to keep strictly out of reach — especially during the holidays when it appears as decoration.
What symptoms will my dog show after eating mistletoe?
Expect drooling, vomiting, diarrhea, lethargy, and abdominal pain within a few hours of ingestion. Larger amounts can trigger more serious signs: ataxia (a drunken gait), slow or irregular heart rate, low blood pressure, labored breathing, seizures, or collapse.
What should I do if my dog ate mistletoe?
Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 right away, even if your dog seems fine — cardiac signs can develop quickly with larger ingestions. If you see weakness, seizures, labored breathing, or collapse, go directly to a 24-hour emergency clinic. Mild GI cases typically resolve within 24–48 hours with supportive care.
Which parts of mistletoe are poisonous to dogs?
Both the berries and the leaves are considered toxic. The berries are often the bigger concern because dogs may find them more appealing to eat, but ingestion of any part of the plant warrants prompt veterinary attention.
Same dog verdict
Related plants for dogs
Monstera
Monstera deliciosa
Monstera deliciosa is a popular tropical houseplant known for its large, fenestrated leaves and vining growth habit. It contains insoluble calcium oxalate crystals that can cause irritation if ingested by pets.
Potentially toxic for cats & dogs.
Snake Plant
Dracaena trifasciata
Dracaena trifasciata is a popular, hardy houseplant known for its stiff, sword-like leaves with striking yellow margins. It is widely appreciated for its air-purifying qualities and ability to thrive in various indoor conditions.
Potentially toxic for cats & dogs.
Philodendron
Philodendron spp.
Philodendrons are popular tropical foliage plants known for their lush, heart-shaped or split leaves. They contain insoluble calcium oxalate crystals that can cause irritation if ingested.
Potentially toxic for cats & dogs.
Cuban Oregano
Coleus amboinicus
The Bread and Butter plant is a succulent herb known for its aromatic, fleshy leaves often used in culinary applications. While popular as a kitchen herb, it contains essential oils that can cause gastrointestinal distress if ingested by pets.
Potentially toxic for cats & dogs.