Cardboard Palm

Symptoms reported in cats

Most serious first.

1. 1
   Icterus (Jaundice), Hepatic Necrosis, and Liver Failure Progression to liver failure typically occurs within 48–72 hours. · The toxin cycasin causes severe liver cell death. Clinical signs associated with this stage include yellowing of the eyes and skin (jaundice) and fluid accumulation in the abdomen (ascites).
2. 2
   Ataxia (wobbly gait), Tremors, Seizures, Paralysis, and Coma Often follows initial GI signs; depression and paralysis may progress as liver failure worsens. · The plant contains the neurotoxin Beta-methylamino-L-alanine (BMAA), which contributes to these central nervous system effects. Depression and lethargy are common early signs that can progress to coma.Coagulopathy (Bleeding Disorders)
3. 3
   Vomiting, Diarrhea (often bloody), and Hemorrhagic Gastritis Within 15 minutes to 4 hours of ingestion. · Vomiting is typically the first clinical sign observed. The diarrhea may appear black or "tarry" (melena) due to digested blood, indicating severe bleeding in the digestive tract.
4. 4
   Abnormal Bruising, Petechiae (pinpoint hemorrhages), and Nosebleeds 48–72 hours (secondary to liver failure). · As the liver fails, it cannot produce the necessary clotting factors, leading to spontaneous bleeding, blood clots, and visible bruising on the skin.
5. 5
   Hypoglycemia (Low Blood Sugar) and Increased Thirst/Urination (Polydipsia/Polyuria) 48–72 hours (associated with liver failure). · Hypoglycemia develops secondary to hepatic necrosis and may contribute to weakness and seizures.

Important notes

Cardboard Palm (Zamia furfuracea) is a cycad plant popular in tropical landscaping and as an indoor ornamental, but it is extremely toxic to cats. Like all cycads, it contains cycasin — a methylazoxymethanol glycoside that gut bacteria convert into a potent liver toxin — as well as the neurotoxic amino acid beta-methylamino-L-alanine (BMAA). All parts are toxic, with the seeds containing the highest concentration. Ingestion of even a small amount can cause acute, life-threatening liver failure, and the prognosis is poor even with immediate treatment.

• Symptoms: Vomiting, diarrhea (sometimes bloody), lethargy, jaundice (yellowing of eyes/gums/skin), abdominal pain, and neurological signs including seizures; liver failure develops within 24–72 hours.
• Seeds are the most lethal part: One or two seeds can be fatal. Do not assume safety because seeds are hidden within the plant.
• Action: Life-threatening emergency. Seek veterinary care immediately — every minute counts with cycasin toxicity.