Quick Veterinary Answer: Yes, Monstera Deliciosa (Swiss Cheese Plant) is toxic to cats and dogs. It contains microscopic needle-shaped insoluble calcium oxalate crystals that pierce the soft tissues of the mouth, causing intense burning, foaming, and difficulty swallowing.
Key Toxicity Facts
| Target Animals: | Cats & Dogs |
| Toxic Principle: | Insoluble calcium oxalate raphide crystals |
| Dangerous Dosage: | Rarely fatal unless extreme airway swelling obstructs breathing. |
| Clinical Severity: | Moderate / Insoluble Calcium Oxalate Crystals |
Symptoms of Ingestion
- Instant oral pain and pawing at the mouth
- Foaming at the mouth and profuse drooling
- Swollen tongue, lips, and oral mucosa
- Vomiting and difficulty swallowing (dysphagia)
- Hoarse barking or meowing due to vocal cord irritation
Emergency First-Aid Protocol
- Do NOT induce vomiting—the sharp crystals will scrape the esophagus a second time.
- Offer small amounts of cold water, low-sodium broth, or a dab of plain yogurt to bind and flush crystals from oral tissue.
- Monitor breathing closely. If tongue or airway swelling occurs, go to an emergency vet immediately.
đź“ž 24/7 Hotlines: ASPCA Animal Poison Control (888-426-4435) | Pet Poison Helpline (855-764-7661)
Frequently Asked Questions
What should I do if my dog chewed a monstera leaf?
Flush their mouth with cool water or broth to remove the oxalate needles. If drooling or distress lasts more than a few hours, consult your vet.