TL;DR: Lily toxicity is a life-threatening emergency in cats, as even microscopic exposure can cause fatal kidney failure. Seek immediate veterinary care if your cat has any contact with a true lily or daylily.
What is lily toxicity and which types of lilies are dangerous to my cat?
Lilies from the Lilium (true lilies) and Hemerocallis (daylilies) genera are extremely poisonous to cats. This includes popular varieties like Easter lilies, Tiger lilies, Stargazer lilies, and Oriental lilies. Every part of the plant is toxic, including the petals, leaves, stems, pollen, and even the water in the vase. Ingesting even a microscopic amount can lead to fatal outcomes.
Is it a medical emergency if my cat licks or eats a lily?
- Seek emergency veterinary care immediately if your cat bites a leaf, licks pollen, or even brushes against a lily.
- Treat this as a High Urgency emergency, as there is no safe amount of exposure for a cat.
- Act quickly, as cats can develop acute, irreversible kidney failure within 24 to 72 hours without aggressive treatment started in the first few hours.
How does providing a photo of the plant help the veterinarian treat my cat?
- Take a clear photo of the plant before heading to the clinic to help the veterinarian accurately identify the species.
- Use the photo to help the vet distinguish between lethal true lilies and varieties like the Peace Lily (Spathiphyllum), which cause mouth irritation but not kidney failure.
- Provide this visual evidence so the medical team can determine the specific treatment protocol required for your cat's safety.
Clinical Context (Merck Veterinary Manual)
For cats, ingestion of any part of a lily (Lilium or Hemerocallis species) is an emergency, as it can cause acute renal failure. Oliguric or anuric renal failure may develop within 24-72 hours of exposure. Diagnosis is based on a history of exposure along with clinical signs. Aggressive supportive and symptomatic therapy is essential, with extended monitoring of urea nitrogen levels. Other causes of renal failure (e.g., ethylene glycol, cholecalciferol) should be considered in the differential diagnosis.
Chapter: Toxicology, Gastroenterology, Emergency
Source: The Merck Veterinary Manual, 11th Edition (Page 3109)