Is Mistletoe Toxic to Cats and Dogs?
Mistletoe is toxic to both cats and dogs. If your pet takes a small nibble, the most likely result is an upset stomach. Larger amounts can affect the heart and blood pressure, and that needs a vet.
That does not mean you have to skip festive greenery. It means you should know where your mistletoe hangs, what symptoms to watch for, and which safe swaps give you the same holiday look.
The short version
- Mistletoe is toxic to cats and dogs. The berries and leaves are the risky parts.
- Small nibbles usually cause vomiting, drooling, and diarrhea.
- Larger amounts can lower blood pressure and affect the heart. Call a vet right away.
- American mistletoe is the common holiday kind. European mistletoe is more potent, so treat any imported sprig with extra care.
- Plastic mistletoe removes the poisoning risk but can still cause a blockage if chewed and swallowed.
- Pet-safe swaps exist that fit the same look and light level.
Why mistletoe is risky for pets
Mistletoe contains substances that irritate the gut and, in bigger doses, can slow the heart and drop blood pressure. You will sometimes see the word toxalbumin in vet literature. In plain words, that is a plant protein that can damage cells, which is why mistletoe is taken more seriously than many other houseplants.
The amount matters. A cat batting one berry off the coffee table and licking it will probably have a rough evening, not an emergency. A dog that eats a whole fallen sprig is a different story, especially a small dog.
One more wrinkle: American mistletoe, the kind sold in US stores around December, is generally considered less potent than European mistletoe. Since you often cannot tell which kind you bought, treat every real sprig as genuinely toxic.
Symptoms to watch for
After a small nibble, symptoms usually show up within a few hours and stay mild:
Drooling or licking the lips a lot. Vomiting. Diarrhea. Mild belly discomfort, which can look like restlessness or a hunched posture.
After a larger amount, symptoms can become more serious: a slowed heart rate, low blood pressure, weakness, wobbliness, or collapse. These signs mean you call a vet immediately, not tomorrow morning.
What to do if your pet eats mistletoe
Remove the plant and check the mouth
Take the mistletoe away and gently clear any leftover bits of berry or leaf from your pet's mouth if you can do so safely.
Note what and how much
Estimate how many berries or leaves are missing and when it happened. This helps the vet judge the risk. Take a photo of the plant if you are not sure what kind it is.
Call your vet or a poison line
Call your vet, an emergency clinic, or the ASPCA Animal Poison Control Center. Describe your pet's size, the amount eaten, and any symptoms. Do not wait for symptoms to appear before calling.
Do not induce vomiting on your own
Only induce vomiting if a vet or poison specialist tells you to. Done wrong, it can make things worse.
Watch your pet closely
Monitor for vomiting, diarrhea, weakness, or wobbliness for the next 24 hours, even if the amount seemed small. Contact your vet if any symptoms appear or get worse.
Real mistletoe vs plastic mistletoe
Real mistletoe carries the poisoning risk, full stop. Dried mistletoe is still toxic, so a sprig from last year's box is not safer.
Plastic mistletoe removes the toxin from the equation, and for many pet owners that is the simplest fix. But fake greenery is not risk-free. Cats love to chew soft plastic leaves, and swallowed pieces can cause an intestinal blockage, which is its own vet emergency.
If you go plastic, choose a sturdy version and hang it well out of reach, exactly where you would have hung the real thing.
| Plant | Pet safety | Look | Light and placement |
|---|---|---|---|
| Christmas cactus | Generally considered non-toxic to cats and dogs | Arching green stems with bright winter blooms | Bright indirect light, happy on a shelf or hanging pot |
| Boston fern | Generally considered non-toxic | Full, lush green fronds | Indirect light, likes a humid bathroom or kitchen |
| Parlor palm | Generally considered non-toxic | Soft, feathery greenery for a festive corner | Low to medium indirect light, easy in apartments |
| Spider plant | Generally considered non-toxic | Cascading striped leaves, great in a hanger | Bright to medium indirect light, very forgiving |
| Haworthia | Generally considered non-toxic | Small striped rosette, a poinsettia-sized accent | Bright indirect light, minimal watering |
Decorating safely with pets in the house
If you love real mistletoe, placement is everything. Hang it high in a doorway your pets cannot reach, and check the floor under it daily. Berries drop as the sprig dries out, and a berry on the floor is a snack to a curious dog.
Skip mistletoe entirely if you have a cat that climbs or a dog that counter-surfs. No hanging spot is truly out of reach for a determined cat.
The same logic applies to other holiday plants. If you are refreshing your whole plant shelf for the season, it is worth checking each one. Our guides to pothos and philodendron cover two common ones that also need distance from pets.
Common questions about mistletoe and pets
Is mistletoe toxic to dogs?
Yes. Mistletoe is toxic to dogs. A small nibble usually causes vomiting and diarrhea. Larger amounts can slow the heart and lower blood pressure, which needs urgent vet care. Small dogs are at higher risk from the same amount.
Is mistletoe toxic to cats?
Yes. Cats face the same risks as dogs: stomach upset from small amounts, and heart and blood pressure effects from larger ones. Cats are also more likely to reach hung sprigs, so placement matters even more.
My dog ate one mistletoe berry. Should I panic?
Do not panic, but do call your vet or a poison line for advice. One berry will most likely cause mild stomach upset at worst. Your vet can tell you what to watch for based on your dog's size.
Are mistletoe berries or leaves more dangerous?
Both are toxic. Berries are the part pets most often eat because they drop to the floor and look like food. Treat the whole plant as unsafe.
Is dried mistletoe still toxic?
Yes. Drying does not remove the toxic substances. A sprig saved from last year is just as risky as a fresh one.
What is the safest mistletoe alternative?
A sturdy plastic version hung out of reach removes the poisoning risk, though chewed plastic can still cause a blockage. For living greenery, a Christmas cactus or Boston fern gives a festive look and is generally considered non-toxic to cats and dogs.
Not sure about a plant in your home?
Every guide on Pawproof Plants starts with one clear answer: is it toxic to cats, dogs, or both. Check the verdict before you buy.
