Why?
True lilies (Lilium, such as Easter, tiger, Asiatic and Oriental lilies) and daylilies (Hemerocallis) contain a toxin, still not fully identified, that destroys a cat's kidneys. Every part is dangerous: flowers, leaves, stems, pollen, bulbs and even the water in the vase. Early signs like vomiting, drooling, loss of appetite and lethargy appear within hours, may seem to ease, and then kidney failure can develop within one to three days.
How much?
No amount is safe, not even a few grains of pollen. The safest choice is to keep lilies and daylilies out of your home and out of any garden your cat can reach, and to turn down bouquets that include them.
The risks
- Acute kidney failure, which can be fatal
- Vomiting and drooling in the first hours
- Loss of appetite and lethargy
- Abnormal urination (too much, then too little)
Your cat ate some: what now?
This is an emergency: take your cat to the vet or call an animal poison control center right away, even if they seem fine. The outlook is much better when treatment starts in the first hours, before kidney signs appear. Bring the plant or a photo, and don't try to make your cat vomit.
Better options
For flowers at home, pick ones considered non-toxic to cats, like roses, phalaenopsis orchids or gerbera daisies. For houseplants, spider plants and parlor palms are safe choices.
Common questions
Is lily pollen dangerous to cats?
Yes, very. A cat only needs to brush against the flower and lick the pollen off its fur to be poisoned. If that happens, call your vet right away; you can wipe the pollen off with a damp cloth so they don't lick more.
Are peace lilies and calla lilies toxic to cats?
They aren't true lilies and don't cause kidney failure. They contain calcium oxalate crystals that irritate the mouth and cause drooling or pawing at the face, so they're still best kept out of reach.
This information is general and does not replace advice from a veterinarian. If your cat has swallowed something toxic, call your vet or an animal poison control center right away, without waiting for symptoms.