My cat ate a lily: why it's an emergency, and what to do

Vet-sourced (ASPCA Animal Poison Control, Merck Veterinary Manual, Pet Poison Helpline) · Last updated July 2026

Of all the household dangers for cats, lilies are among the most deadly — and the most misunderstood. True lilies (Easter, Tiger, Asiatic, Stargazer, Oriental) and daylilies cause sudden kidney failure in cats, and it doesn't take much: nibbling a leaf or petal, chewing a stem, licking pollen off their fur, or even drinking the water from the vase can be enough. There's no known safe amount — so any exposure is a true emergency, and the clock matters. Here's how to tell what you're dealing with and exactly what to do.

Which lilies are deadly to cats?

Not every plant with "lily" in its name is the same. The distinction is life-or-death, so it's worth knowing:

If your cat had any contact with a plant in the top two rows, treat it as an emergency immediately. Not sure which one you have? The checker will help you identify it:

Cat & lily risk checker

Tell the deadly lilies from the harmless look-alikes:

Prefer the full-page version? Open the Cat & Lily Poisoning Risk Checker →

Why even a tiny amount is an emergency

With true lilies, the usual "how much did they eat?" math doesn't apply — there is no established safe dose, and the whole plant is toxic. Cats have been poisoned by:

• Biting or chewing a single leaf or petal
• Licking pollen off their coat or paws after brushing past the flower
• Drinking water from the vase a bouquet sat in
• Grooming after walking through fallen pollen

That's why a lily in the house is a risk even if you never see your cat eat it — and why "he only touched it" is still worth an immediate call.

Symptoms and the timeline

Signs progress in stages, which is exactly why waiting is so dangerous — the early phase looks mild while the kidneys are being injured:

• 0–12 hours: vomiting, drooling, loss of appetite, lethargy, hiding
• 12–72 hours: kidney injury sets in — increased thirst and urination at first, then reduced or no urination, dehydration, worsening lethargy
• Beyond ~3 days (untreated): kidney failure, which is often fatal

The early vomiting can pass and a cat may briefly seem better — do not be reassured by that. Act on the exposure, not the symptoms.

What to do if your cat got into a lily

1. Identify the plant and note the exposure: ate it, chewed it, pollen on the fur, or vase water — and roughly when. Take a photo and bring a piece of the plant if you can.
2. Don't wait to see symptoms, and don't induce vomiting on your own unless a vet or poison-control expert directs you to.
3. Call immediately: your vet, or a 24/7 line — ASPCA Animal Poison Control (888) 426-4435 or Pet Poison Helpline (855) 764-7661.
4. Get to an emergency vet now. The treatment window that matters most is roughly the first 18 hours. Find the nearest open emergency vet →
5. If there's pollen on your cat's coat, you can gently wipe/wash it off to stop further grooming — but don't let that delay the vet trip.

What the vet will do

If the exposure was recent, the vet may induce vomiting and give activated charcoal to reduce absorption. The mainstay is aggressive IV fluid therapy for about 48–72 hours to flush the toxin and protect the kidneys, along with monitoring of kidney values and urine output. Prognosis is closely tied to timing: cats treated with fluids within about 18 hours, before kidney damage sets in, generally do well; once a cat stops producing urine, the outlook becomes grave. This is the definition of a poisoning where getting in early truly saves lives.

What about dogs?

The severe kidney-failure syndrome from true lilies and daylilies is a cat problem — in dogs, eating true lilies usually causes only mild stomach upset. One important exception: Lily of the Valley is toxic to dogs and cats alike (it affects the heart), so treat that plant as an emergency for either. For the broader picture, see our complete list of foods toxic to dogs and cats.

Frequently asked questions

Are lilies poisonous to cats?

Yes — true lilies (Lilium) and daylilies (Hemerocallis) are extremely toxic to cats and cause acute kidney failure. Every part of the plant is dangerous, including the pollen and the water in the vase, and there is no known safe amount, so any exposure is an emergency.

My cat only licked pollen off its fur — is that really dangerous?

Yes. Cats have developed fatal kidney failure from grooming lily pollen off their coat, and from drinking vase water. Don't wait to see if symptoms appear — call your vet or a poison line right away.

How much lily is toxic to a cat?

There's no established safe dose. A bite of a leaf or petal, a small amount of pollen, or a sip of vase water can be enough to cause kidney failure, so treat any exposure to a true lily as a medical emergency.

How long do I have to get my cat help?

Sooner is dramatically better. Treatment — especially IV fluids — is most effective when started within about 18 hours of exposure, before the kidneys are damaged. After that window the prognosis drops sharply, so go immediately rather than waiting for signs.

Are lilies toxic to dogs?

True lilies and daylilies mainly cause mild stomach upset in dogs, not the kidney failure seen in cats — that syndrome is cat-specific. However, Lily of the Valley is dangerous to dogs and cats alike because it affects the heart.

Which lilies are safe to have around cats?

No true lily is safe for a cat. Plants sometimes called "lilies" that are not true lilies — peace lily, calla lily, Peruvian lily — cause mouth and throat irritation rather than kidney failure, but they're still best kept away. The safest choice is a lily-free home if you have cats.

Sources: ASPCA Animal Poison Control Center; Merck Veterinary Manual (lily nephrotoxicosis in cats); Pet Poison Helpline. This guide is general information, not a substitute for veterinary advice — when in doubt, call a professional.