Is Lily of the Valley Toxic to Dogs?
Also known as: May Bells, Our Lady’s Tears, Convallaria majalis · Convallaria majalis
What makes it toxic
Convallatoxin and related cardiac glycosides throughout the plant, including the flowers, stems, roots and water in which cut stems stood. They act like digoxin, altering heart rate and rhythm.
Warning signs to watch for
Drooling, vomiting and diarrhea within a few hours, followed by lethargy, weakness, slow or irregular heartbeat, wobbliness, seizures and possible cardiac arrest.
What to do if your dog eats it
This is an emergency. Take the dog to a vet or animal ER at once, ideally with the plant sample. Early decontamination, ECG monitoring and supportive drugs dramatically improve survival.
Common questions
How many leaves or flowers would hurt a dog?
Small dogs are at meaningful risk from a modest handful; larger dogs need more, but there is no reason to test the margin. Any ingestion warrants immediate vet contact.
Can lily of the valley in a bouquet poison my dog from afar?
Chewed stems or flowers absolutely can, and vase water holds leached glycosides. Keep bouquets well out of reach and empty the water where no pet can drink it.
Is it related to true lilies?
No. Despite the name it is not a Lilium — but the name similarity does not matter, because both plants are seriously dangerous.
More plants checked for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.