Why it's dangerous
The primary toxin cycasin causes severe liver failure, while additional toxins like BMAA affect the central nervous system.
Toxic compound: Cycasin
How vets treat it
The vet first tries to clear the toxin. If your dog is neurologically stable, the vet may induce vomiting, then give anti-nausea medicine and activated charcoal. The Merck Veterinary Manual recommends repeat charcoal doses because the toxin recirculates through the liver and gut. In the largest dog study, activated charcoal was linked to a much lower chance of death (82% lower odds). Hospital care is preferred, with liver enzymes checked daily for 72 hours plus blood sugar and clotting tests. Treatment can include IV fluids, liver support such as N-acetylcysteine (NAC), SAMe and vitamin E, medicines for tremors and seizures, stomach protectants, dextrose for low blood sugar and blood products for bleeding. Follow-up blood tests continue for several weeks, because one set of results can't predict the outcome and hidden liver damage can show up later.
Outlook
Sago palm poisoning is dangerous and can kill dogs. Dogs are extremely sensitive to cycads, and many deaths come from destruction of liver tissue (liver necrosis). In published studies, between about 12% (the largest study, of 130 dogs) and 64% (a study of 14 dogs) of poisoned dogs died. Dogs that get prompt, aggressive care have a fair to good outlook. The outlook is guarded to poor if serious signs develop or treatment is delayed. Some dogs need long-term care, and some develop lasting liver damage weeks to months later.
Where pets are exposed
- Sago palm (Cycas revoluta), also sold as Japanese sago palm, king sago palm or cycad.
- Related cycads that carry the same toxins, such as the coontie palm and the cardboard palm (Zamia species).
- Gardens and yards. In the US, sago palms are most common in the South but are found nationwide.
- Potted plants and bonsai sold at nurseries and home-improvement stores. Cardboard palms are turning up in garden stores too.
- Every part of the plant: the seeds (sometimes called nuts), fronds, stem and roots. The seeds, which are orange to red on female plants, are the most toxic part, and pets are drawn to the plant.
Prevention
- The only sure prevention is to keep pets and sago palms apart. Don't keep one in your home or in a yard your pet can reach.
- Every part of the plant is toxic, including the fronds, stem and roots, so the seeds aren't the only danger.
- Female plants grow orange to red seeds, the most toxic part, and pets are drawn to the plant.
- Watch for related cycads sold under other names. Cardboard palm, coontie palm and other Zamia species carry the same risk.
Good to know
All parts of the plant are poisonous, but the seeds (nuts) are the most toxic. Liver failure typically manifests within 2-3 days.
Common questions
Are sago palms poisonous to dogs?
Yes, and the poisoning can be fatal. Every part of the plant is toxic, and the seeds are the most toxic part. Dogs are extremely sensitive to cycads, and many deaths come from liver damage. Call your vet or a pet poison line right away if your dog chews one.
Are sago palms toxic to cats?
Yes. ASPCA, VCA and NC State list sago palm as toxic to cats, and VCA calls it highly toxic to dogs and cats. No published reports of poisoned cats could be found, though, so there are no cat-specific figures for dose, timing or survival. Treat any chewing as an emergency.
How many sago palm seeds can kill a dog?
No source gives a measured number for dogs. ASPCA says as few as 1 to 2 seeds can be fatal, but that statement doesn't name a species or give a body weight. VCA says even a small amount of plant material can cause serious effects. No source gives a safe amount, so treat any seed or piece of the plant as an emergency.
How long after eating sago palm will my dog get sick?
Vomiting and lethargy can start within 15 minutes to several hours, and the Merck Veterinary Manual says first signs often appear within 4 hours. Liver failure can follow within 48 to 72 hours, and liver blood tests can stay normal for up to 72 hours. In some dogs that seem to recover, serious liver damage shows up weeks to months later.
Can a dog survive sago palm poisoning?
Yes, many do, especially with fast treatment, but survival varies a lot between studies. Deaths ranged from about 12% of dogs in the largest study (130 dogs) to 64% in a study of 14 dogs. Activated charcoal given by the vet was linked to better survival, and dogs that get prompt, aggressive care have a fair to good outlook.
My dog ate part of a sago palm but seems fine. Do I still need a vet?
Yes. Call a vet or a pet poison line now. Liver damage is delayed, and blood tests can stay normal for up to 72 hours. Early decontamination by the vet gives the best chance of a good outcome.
Sources
- Merck Veterinary Manual — Houseplants and Ornamentals Toxic to Animals
- Merck Veterinary Manual — Hepatotoxins in Small Animals
- ASPCA Animal Poison Control Center — Toxic and Non-toxic Plants: Cycads
- ASPCA — The Dangers of the Sago Palm
- NC State Extension Gardener Plant Toolbox — Cycas revoluta (Cycad, Japanese Sago Palm, King Sago Palm, Sago Palm)
- VCA Animal Hospitals — Sago Palm Poisoning
- Australian Veterinary Journal — The characterization of cycad palm toxicosis and treatment effects in 130 dogs (2020)
- Journal of the American Animal Hospital Association — Cycad Palm Toxicosis in 14 Dogs from Texas (2017)
- Pet Poison Helpline
This page is informational and is not veterinary advice. If your pet has been exposed to something risky, contact your vet or an animal poison control line right away.
