Sago palms (Cycas revoluta) are one of the most toxic plants for dogs and cats. All parts are toxic, but the seeds (nuts) contain the highest concentration of cycasin. Ingestion of even 1–2 seeds can cause acute liver failure, with a mortality rate of up to 50–75% even with aggressive treatment.
Why Are Sago Palms So Toxic?
Sago palms contain cycasin (methylazoxymethanol glucoside) and other toxic compounds. Cycasin is metabolized by gut bacteria into a highly reactive carcinogen/hepatotoxin that causes direct liver cell death (hepatic necrosis) and GI hemorrhage.
The seeds contain 10× higher concentration than the leaves and trunk. Dogs are attracted to the seeds due to their round, nut-like appearance. Even crushing a seed and licking fingers is considered a toxic exposure.
| Plant Part | Cycasin Level | Toxic Amount | Risk |
|---|---|---|---|
| Seeds (nuts) | Highest (~1.5% wet weight) | 1–2 seeds for any dog | ☠️ LETHAL |
| Leaves (fronds) | Lower | Larger amounts | ⚠️ VERY HIGH |
| Trunk/Bark | Low-medium | Large amounts | 🔶 HIGH |
| Roots | Medium | Any amount | ⚠️ HIGH |
Symptoms of Sago Palm Poisoning
Immediate GI Signs
Vomiting, drooling, retching within minutes. Act NOW.
Continued GI Distress
Diarrhea, bloody stool, severe abdominal pain.
Liver Failure Begins
Jaundice, collapse, neurological signs as liver fails.
Critical
Mortality 50–75% even with aggressive treatment. Recovery possible but prolonged.
🚨 What To Do Right Now
Sago palm has a 50–75% mortality rate even with treatment — act immediately.
Frequently Asked Questions
Extremely. They have one of the highest mortality rates of any plant toxin in veterinary medicine — 50–75% even with aggressive treatment.
All cycad species (the sago palm family) contain cycasin and are toxic. This includes Cycas revoluta (sago palm), Cycas circinalis, and Macrozamia species.
Yes. Even the leaves contain cycasin. Any ingestion warrants emergency vet care.
Treatment involves aggressive IV fluid therapy, liver protectants, and supportive care. Early treatment significantly improves outcomes, but there is no specific antidote.
Yes, strongly recommended. If removal isn't possible, create a physical barrier dogs cannot access.