Is it toxic to dogs?
Dieffenbachia
Dieffenbachia spp. · Araceae
Also called Dumb cane, Giant dumb cane, Tropic snow, Exotica
Toxic to dogs
Severity: Mild
Yes. Dieffenbachia is toxic to dogs. Chewing it releases needle-like crystals that cause painful burning of the mouth, heavy drooling and vomiting, and in rare cases swelling severe enough to affect breathing.
- Toxic parts
- All parts, including the sap
- Toxic compounds
- Insoluble calcium oxalates and a proteolytic enzyme
- Where you’ll find it
- Houseplant
- When signs start
- Mouth pain starts almost immediately once the plant is chewed.
Signs of poisoning
- Intense burning and irritation of the mouth, tongue and lips
- Heavy drooling
- Pawing at the mouth
- Head shaking
- Gagging
- Vomiting
- Difficulty swallowing
- Rarely, throat swelling and trouble breathing
Why it’s harmful to dogs
Dieffenbachia, better known as dumb cane, is a classic houseplant with thick stems and large leaves splashed with cream and green. It is easy to grow and often stands on the floor, right at dog height.
The ASPCA names insoluble calcium oxalates and a protein-digesting enzyme as the toxic principles. When a dog chews a leaf or stem, microscopic crystals are released and irritate the lips, tongue and throat. Merck Veterinary Manual describes immediate burning pain, drooling, head shaking and vomiting, and notes that the pain limits how much a dog usually eats and that deaths are infrequent.
Pet Poison Helpline adds that in rare instances, severe throat swelling can cause breathing difficulty. Even so, an ASPCA Poison Control article that names dumb cane among these crystal-containing plants describes their overall severity as low. It's related to pothos and philodendron, which cause similar problems.
If your dog ate dieffenbachia
Move the plant out of reach and note how much your dog chewed. A dog that has chewed it will often paw at the mouth, drool and may vomit. Call your vet or a poison helpline for advice, because a mouth full of crystals is painful and can swell. US owners can call ASPCA Animal Poison Control at (888) 426-4435 or Pet Poison Helpline at (855) 764-7661 (fees may apply), and owners elsewhere can call their local emergency vet. Don't induce vomiting at home.
Go to an emergency clinic right away if you see swelling of the face, lips or tongue, noisy or hard breathing, gagging that won't stop, or a dog that can't swallow. Bring a leaf or photo of the plant.
Keeping your dog safe
Keep dieffenbachia on a high plant stand or in a room your dog can't enter. Floor-level pots are the usual culprits, especially with puppies, who explore with their mouths. If a leaf drops, pick it up at once.
Teach a dependable "leave it" and keep chews handy so plants aren't the best entertainment in the room. If you want a big, leafy floor plant, parlor palm and areca palm are listed by the ASPCA as non-toxic to dogs.
Dog-safe alternatives
Frequently asked questions
Is dieffenbachia poisonous to dogs?
Yes. The ASPCA lists it as toxic to dogs. Chewing releases calcium oxalate crystals and an enzyme that irritate the mouth, causing drooling and vomiting.
Is dumb cane the same plant as dieffenbachia?
Yes. Dumb cane is the common name for Dieffenbachia, and the ASPCA lists both Dumbcane and Giant Dumb Cane as toxic to dogs.
Can dieffenbachia kill a dog?
Merck Veterinary Manual says death is infrequent because the pain limits how much dogs eat. Pet Poison Helpline notes that severe throat swelling with breathing difficulty is rare but possible, so call your vet.
Why does dieffenbachia hurt so much?
The plant contains needle-like crystals of calcium oxalate that are released when it is chewed. They irritate the lips, mouth and throat.
Written from veterinary sources by the Pawsplained editorial team. Not yet reviewed by a veterinarian; this is general information, not a diagnosis or treatment plan. Updated Oct 30, 2026. Editorial policy