Is Dieffenbachia (Dumb Cane) Toxic to Cats and Dogs?
Dieffenbachia (dumb cane) is moderately toxic to cats and dogs — its sap causes intense mouth burning, swelling, and drooling. Call a vet if swelling or breathing trouble appears.
Can cause real harm — call a vet for guidance.
Can cause real harm — call a vet for guidance.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Dieffenbachia (Dumb Cane)?
Dieffenbachia (dumb cane) is moderately toxic to cats and dogs — its sap causes intense mouth burning, swelling, and drooling. Call a vet if swelling or breathing trouble appears.
Also known as: dumb cane, dumbcane, dieffenbachia seguine, leopard lily, mother in law plant.
Symptoms to Watch For
🐕 In Dogs
- Immediate, intense burning and swelling of the mouth, lips, and tongue
- Drooling and difficulty swallowing
- Vomiting and foaming at the mouth
- In rare cases: swelling that blocks the airway
🐈 In Cats
- Burning, swelling, and redness of the mouth and tongue
- Drooling and pawing at the mouth
- Vomiting and reduced appetite
- Rarely: airway obstruction from severe swelling
What to Do If Ingested
- Rinse the mouth with water to remove plant material and ease burning.
- Wipe any sap off the fur or face.
- Offer water or milk to soothe the mouth.
- Call a veterinarian or poison hotline for guidance.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- Difficulty breathing, gagging, or swelling in the throat
- Persistent drooling or inability to swallow
- Vomiting that will not stop
Frequently Asked Questions
Frequently Asked Questions
Why is dieffenbachia called "dumb cane"?
The plant gets its nickname because chewing it causes such intense mouth and throat swelling that a person or animal can temporarily lose the ability to speak ("dumb" meaning mute). The insoluble calcium oxalate crystals in the sap are what cause the burning and swelling.
What should I do if my pet chews on a dieffenbachia?
Rinse the mouth with water to remove the irritating crystals and sap, wipe any sap off the fur, and offer water or milk to soothe the burning. Then call a vet or poison hotline for guidance, especially if there is swelling, drooling, or any trouble breathing.
Can dieffenbachia cause breathing problems?
In rare cases, the throat swelling can become severe enough to block the airway. This is more of a risk with large ingestions. If your pet is gagging, struggling to breathe, or has obvious throat swelling, treat it as an emergency and get to a vet immediately.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-07-11