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Is Swiss Cheese Plant Toxic to Dogs?

⚠️ Mildly ToxicSeverity: Mild
✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit
⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.
Yes, mildly — the Swiss cheese plant is toxic to dogs. Its leaves contain calcium oxalate crystals that injure the mouth and stomach on contact.

Also known as: Monstera, Split-Leaf Philodendron, Fruit Salad Plant · Monstera deliciosa

What makes it toxic

Insoluble calcium oxalate crystals throughout the leaves and stems. Chewing releases the needle-like crystals, which pierce the lining of the mouth and digestive tract.

Warning signs to watch for

Immediate oral pain and burning, drooling, vomiting, gagging and loss of appetite within minutes. Most cases settle within a day.

What to do if your dog eats it

Rinse the dog’s mouth with water, clear away leftover leaves and offer fresh water. Contact your vet if vomiting is repeated or the dog seems in pain.

Common questions

Why does my dog drool so fast after biting it?

The crystals cause immediate physical injury rather than a delayed chemical poison, so drooling and pawing start within minutes.

How is Monstera different from a true philodendron?

Different genus, same defense — calcium oxalate crystals. Both are only mildly toxic, but both should stay out of a chewer’s reach.

More plants checked for dogs

Pothos☠️ ToxicYes, pothos is toxic to dogs. Chewing any part of the vine releases calcium oxalate crystals thaAloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to dogs. The skin and latex layer of the leaf contain coSpider Plant✅ Non-ToxicNo, spider plants are non-toxic to dogs. A dog that nibbles the arching leaves is not at risk ofEaster Lily⚠️ Mildly ToxicEaster lilies are only mildly toxic to dogs — they usually cause stomach upset, not the fatal kiSago Palm☠️ ToxicYes — sago palm is severely toxic to dogs, with a documented fatality rate around 50% when untreBoston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to dogs. Chewing a frond will not poison your dog.

This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.