Pencil Cactus

Yes, pencil cactus (Euphorbia tirucalli) is potentially toxic to cats. The plant's milky white sap is a potent irritant that can cause oral irritation, drooling, vomiting, and eye irritation if it contacts your cat's face.

Oral signs appear within minutes of biting the plant: drooling, pawing at the mouth, oral pain, and vomiting are the most common reactions. Uncomplicated cases typically settle within 12–24 hours, but persistent drooling, refusal to eat, or vomiting that doesn't settle warrants a same-day vet call.

Flush the eye immediately with copious water or saline and get to a vet right away — do not let your cat rub the eye. Per Pet Poison Helpline, sap exposure can cause redness, swelling, squinting, and temporary blindness, and corneal injury needs prompt evaluation. You can also call the ASPCA Animal Poison Control at (888) 426-4435.

Unlike most succulents, pencil cactus belongs to the Euphorbia genus and produces a milky latex sap that is a potent chemical irritant — not just a digestive irritant. Skin contact can cause a painful rash, and the sap can damage eye tissue on direct contact, making it significantly more hazardous than typical succulent species.

Yes, pencil cactus (Euphorbia tirucalli) is toxic to dogs. The milky white sap inside its pencil-thin branches causes drooling, oral pain, vomiting, and skin or eye inflammation on contact. Seek veterinary care if your dog has chewed on or been exposed to the sap.

Chewing on a pencil cactus releases an irritating sap that causes immediate oral pain, drooling, and vomiting in dogs. Oral signs appear within minutes. Rinse your dog's mouth with water and offer fluids; call your vet same-day if drooling persists, your dog refuses to eat, or vomiting continues.

Sap that contacts a dog's eye can cause redness, swelling, squinting, and — per Pet Poison Helpline — temporary blindness. If sap gets in your dog's eye, flush immediately with water or saline and go to the vet right away, especially if your dog is squinting or holding the eye closed.

For mouth contact, rinse your dog's mouth with water and offer fluids. For skin contact, wash the area with mild soap and water. For eye exposure, flush immediately with water or saline and head to the vet. Call the ASPCA Animal Poison Control at (888) 426-4435 or your vet right away if you see facial swelling, persistent drooling, or eye irritation.