Monstera and dogs: ingestion, symptoms, what to do

Yes, Monstera deliciosa is toxic to dogs. Toxicity is the same as for cats (due to calcium oxalate crystals) but manifests slightly differently depending on the animal’s temperament and size. This article details what to know and do.

This information is reliable but never replaces veterinary advice in real incidents.

Mechanism, the same oxalates as for cats

Monstera contains in all its tissues (leaves, stem, aerial roots) microscopic calcium oxalate crystals in needle shape, called raphides. When the animal bites, its teeth release these crystals, which plant in the mucous membranes of mouth, lips, and throat.

Immediate effect: lancinating pain, burning, abundant salivation. Unpleasant but rarely fatal for an adult dog.

Differences between dogs and cats

Several particularities of dogs are worth noting.

The dog is bigger. For the same absolute dose (a bite of leaf), a 15 kg dog handles it better than a 4 kg cat. This explains why dogs less frequently develop serious intoxications.

The dog eats more before stopping. Where a cat tastes, feels pain, and retreats, some dogs (especially very greedy breeds or puppies) can swallow several bites before reacting.

The dog regurgitates more easily. Rather protective. The animal quickly evacuates part of the ingested dose.

Puppies are more vulnerable. Small body mass plus curiosity plus low danger learning plus exploratory mastication equals risk combination.

Symptoms of ingestion

In the minutes following a bite, the dog shows:

Abundant salivation. Drool dripping, wetting muzzle and chest. The most visible early sign.

Snout rubbing. The dog wipes its face on the floor, its paws, or a sofa. Trying to evacuate irritation.

Coughing and throat clearing if crystals reached lower.

Unusual vocalizations: whimpering, short cries. The pain is real.

Refusal to eat for several hours, sometimes until the next day.

Isolated vomiting within an hour after ingestion, if several bites were swallowed.

In more serious cases (rare but watch): visible swelling of lips, tongue, or snout, breathing difficulty (pale or blueish gums), repeated vomiting (over 3 in 2 hours), profound apathy beyond 4-6 hours, intense diarrhea, dehydration from prolonged refusal to drink. These are veterinary emergency signals.

What to do immediately

You catch your dog chewing the Monstera. Here is the sequence.

Remove what remains in its mouth. With gloves if possible, open the jaw and extract fragments. Do not use bare fingers if there is sap. It may irritate your skin.

Rinse its mouth with fresh water. A needleless syringe or a wet cloth slid on the gums suffices. The goal: dislodge remaining crystals.

Offer water generously. Water dilutes remaining oxalates and aids elimination. Most dogs drink willingly after the shock.

Give a soft meal (low fat, low spice) within 2-3 hours. Neutralizes mouth discomfort and helps resume rhythm.

Watch without leaving for 4-6 hours. Memorize time, symptoms, their evolution.

Never induce vomiting with salt water or hydrogen peroxide. Dangerous (inhalation risk, ionic imbalance) and ineffective against oxalates already embedded.

Call a vet if symptoms worsen or your dog is in a risk group (puppy, very small dog, elderly animal, unusual behavior).

Useful numbers

In the US, ASPCA Animal Poison Control: 1-888-426-4435 (24/7, fee). In Canada, Pet Poison Helpline: 1-855-764-7661. In the UK, Animal PoisonLine: 01202 509 000.

For follow up, your regular vet is the best reference.

Cohabiting dog and Monstera

Three approaches based on your dog’s temperament.

The disinterested dog (most balanced adult dogs). The Monstera can stay accessible. A firm “no” first time suffices, oxalate smell and taste do the rest. It does not return.

The curious or young dog. Elevate the plant. A high table or piece of furniture suffices for most dogs (unlike cats who jump everywhere). A plant set at 1.20 m is inaccessible to an average dog.

The puppy or compulsive chewer. You must choose. Either the Monstera lives in a room the dog cannot access. Or you give it to a relative without animals. Forced cohabitation with a dog that eats everything always ends in incident.

Safe alternative plants

If you want tropical aesthetics without risk, these plants are non toxic to dogs per ASPCA:

Areca palm, tall elegant structure. Kentia palm, slow luxurious growth. Calathea orbifolia or medallion, large decorative leaves. Boston fern, dense hanging foliage. Pilea peperomioides, modern, easy, small. Hoya carnosa, waxy leaved vine. Maranta (prayer plant), spectacular patterns. Phalaenopsis (orchid), long flowering.

The obvious advantage: no stress when you leave your dog alone in the room.

A measured position

The “can I have a Monstera with a dog” debate has no universal answer. Everything depends on the dog (character, size, age), your vigilance, your risk tolerance. If you are adopting both in this order:

If the dog comes first, choose a non toxic plant instead. Simplest. If the Monstera is already at home, watch your dog for two weeks. If it ignores the plant, status quo is viable. If it returns, put the plant out of reach.

The worst option, ignore the topic and hope. A serious intoxication remains rare but painful to live through on both sides.

See also Monstera toxic for cats and our complete Monstera sheet.