Cycad

Symptoms reported in cats

Most serious first.

1. 1
   Acute Liver Failure, Jaundice (Icterus) Delayed; typically develops within 48 to 72 hours. · ◦ Signs include yellowing of the skin and eyes (jaundice), increased thirst, and fluid accumulation in the abdomen (ascites). ◦ The toxin cycasin causes liver cells to die (hepatic necrosis), which is a primary cause of death in affected animals.
2. 2
   Vomiting, Diarrhea, and Abdominal Pain Rapid; typically within 15 minutes to 4 hours of ingestion. · ◦ Vomiting is often the first sign. ◦ Diarrhea may be bloody or appear as "black, tarry feces" (melena), indicating severe irritation and hemorrhagic gastritis.Liver Failure (Hepatic Necrosis)
3. 3
   Seizures, Tremors, and Ataxia (Wobbly Gait) Can occur as toxicity progresses. · ◦ The neurotoxin beta-methylamino-L-alanine (BMAA) is responsible for central nervous system effects. ◦ Symptoms range from muscle tremors and weakness to paralysis, coma, and death.Abnormal Bleeding (Coagulopathy)
4. 4
   Bruising (Petechiae/Ecchymosis), Nosebleeds, and Bloody Stool Delayed (secondary to liver failure). · ◦ As the liver fails, it cannot produce necessary blood-clotting factors, leading to spontaneous bleeding and visible bruising on the skin or gums.
5. 5
   Lethargy and Depression Early onset, worsening over time. · ◦ Cats may appear unusually tired, weak, or unresponsive as the toxins affect multiple body systems.

Important notes

Cycads, including sago palm (Cycas revoluta) and related Zamia species, are extremely dangerous ornamental plants for cats. They are among the most liver-toxic plants known in veterinary medicine and should not be kept in homes or gardens where cats have access. The main danger comes from a toxin called cycasin. After a cat eats the plant, this substance can be changed by gut bacteria into a compound that severely damages the liver. Cycads may also contain compounds that can affect the nervous system, such as BMAA. All parts of the plant are toxic, including the leaves, stems, roots, and seeds, but the seeds contain the highest levels of cycasin and are especially dangerous. If a cat eats any part of a cycad, early signs may include vomiting, diarrhea, drooling, loss of appetite, and low energy. More serious signs can follow, such as jaundice, abnormal bleeding, weakness, seizures, and acute liver failure. Even a small amount of seed material can cause severe and potentially irreversible damage, and the outlook may still be poor even with aggressive treatment. Homes with cats should completely avoid keeping cycads. If you suspect your cat has chewed or swallowed any part of the plant, especially a seed, contact a veterinarian or emergency animal hospital immediately—do not wait for symptoms to appear.

• Symptoms: Vomiting, diarrhea (often with blood), severe lethargy, jaundice (yellow skin/eyes/gums), abdominal pain, neurological signs including seizures; liver failure develops within 24–72 hours.
• Seeds are the greatest danger: One or two seeds can be fatal. The entire plant — leaves, roots, and seeds — contains toxic compounds.
• Action: This is a life-threatening emergency. Seek immediate veterinary care if any part of the plant has been ingested — do not wait for symptoms.