PupkeeperToxic
Is dieffenbachia (dumb cane) toxic to dogs? Yes: toxic
Toxic. Chewing dumb cane releases sharp crystals that burn the mouth, causing pain, heavy drooling and vomiting.
If your dog ate or touched this, call your vet or a pet poison line now
United States
Poison lines in other countries: United Kingdom, Canada, Australia, New Zealand, Belgium, France, JM, PR, Singapore, Switzerland, TT, VI
Dieffenbachia (dumb cane) and dogs: key facts
- Verdict
- Toxic · Call your vet or a poison line
- What it can do
- Burning, irritated mouth, tongue and lips, heavy drooling, vomiting, trouble swallowing and loss of appetite. All 6
- How fast
- Right away (mouth pain)
- What to do now
- Call your vet or a pet poison line now. All steps
- Sources
- ASPCA Animal Poison Control, Merck Veterinary Manual, Pet Poison Helpline. Reviewed 9 October 2026.
What should I do if my dog ate dieffenbachia (dumb cane)?
- Call your vet or a pet poison line now.
- Take any plant pieces away and rinse your dog's mouth with water.
- Bring a piece of the plant in a bag, or a photo, to help identify it.
- Go to a vet right away if your dog has trouble breathing.
Don't
- Don't make your dog vomit unless a vet tells you to.
- Don't give milk, oil, salt or other home remedies unless a vet tells you to.
Symptoms to watch for
- Burning, irritated mouth, tongue and lips
- Heavy drooling
- Vomiting
- Trouble swallowing
- Loss of appetite
- Trouble breathing from mouth and throat swelling
When signs appear: Right away (mouth pain)
Why
The plant contains insoluble calcium oxalate crystals and an enzyme that irritate the mouth and throat. The pain usually stops a dog from eating much.
Sources
- ASPCA Animal Poison Control: Dieffenbachia
- Merck Veterinary Manual: Houseplants and Ornamentals Toxic to Animals
- Pet Poison Helpline: Toxic Plants to Pets (first aid)
Guide reviewed 9 October 2026. Page updated 7 November 2026.
General information from the sources above, not a diagnosis. When in doubt, call your vet.