Is Dieffenbachia Toxic to Cats and Dogs?
Yes, Dieffenbachia is toxic to both cats and dogs. This common houseplant, also known by names like Dumb Cane, Tropic Snow, and Exotica, contains substances that cause a painful reaction if a pet chews on or eats any part of it.
The plant’s toxicity is due to insoluble calcium oxalate crystals and a proteolytic enzyme. When a pet bites the plant, these components can cause immediate and intense irritation to the mouth, tongue, and throat.
Dieffenbachia: what the ASPCA database lists
| ASPCA entry | Dieffenbachia |
|---|---|
| Other common names | Charming Dieffenbachia, Giant Dumb Cane, Tropic Snow, Dumbcane, Exotica, Spotted Dumb Cane, Exotica Perfection |
| Scientific name | Dieffenbachia |
| Family | Araceae |
| Toxic to | Toxic to Dogs, Toxic to Cats |
| Non-toxic to | None listed |
| Toxic principles | Insoluble calcium oxalates, proteolytic enzyme |
| Clinical signs listed | Oral irritation, intense burning and irritation of mouth , tongue and lips, excessive drooling, vomiting, difficulty swallowing |
What the ASPCA says about dieffenbachia
The American Society for the Prevention of Cruelty to Animals (ASPCA) lists Dieffenbachia as toxic to cats and dogs. The plant is part of the Araceae family. According to the ASPCA, the toxic principles are insoluble calcium oxalates and a proteolytic enzyme.
The clinical signs of exposure in pets include:
- Oral irritation
- Intense burning and irritation of the mouth, tongue, and lips
- Excessive drooling
- Vomiting
- Difficulty swallowing
These symptoms typically occur very quickly after a pet chews on the plant.
What this means in a home with pets
The primary danger from Dieffenbachia comes from a pet chewing on or ingesting the leaves, stems, or any other part of the plant. The insoluble calcium oxalate crystals are tiny, sharp structures. When an animal bites into the plant, these crystals embed themselves in the soft tissues of the mouth and throat, causing immediate pain and inflammation.
The swelling and irritation can make swallowing difficult. The excessive drooling and vomiting are the body’s reactions to this intense oral discomfort. Even a small amount of chewing can trigger these painful symptoms.
Keeping pets and this plant apart
To prevent accidental poisoning, it is safest to keep Dieffenbachia plants completely out of reach of all pets. Placing them on high shelves, in hanging baskets, or in rooms that pets cannot access are effective strategies. Always supervise pets, especially curious puppies and kittens, around any houseplant.
Regularly check the area around the plant for fallen leaves and dispose of them immediately. When pruning or repotting, ensure your cat or dog is in another room to prevent them from investigating the plant clippings. Always read the labels of any new plants you bring into your home.
When to call your vet
If your pet chewed or ate part of this plant, call your veterinarian or an animal poison control line. Note which plant and which part, how much may be gone and when, and take a photo or a piece of the plant with you.
If you suspect your cat or dog has chewed on or eaten a Dieffenbachia plant, contact your veterinarian or the ASPCA Animal Poison Control Center immediately. Note the time of exposure and how much of the plant you think your pet consumed. Do not try to induce vomiting or provide any home remedies unless specifically instructed to do so by a veterinary professional.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
Book an appointment soon
- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.