Lily Toxicity in Cats

Lily toxicity in cats refers to kidney damage that can follow ingestion of any part of certain lily species—petals, leaves, pollen, or water from the vase. True lilies (Lilium species) and daylilies (Hemerocallis species) contain compounds that are highly toxic to cats, even in small amounts. Other plants commonly called lilies, such as peace lilies or calla lilies, may cause irritation but do not typically produce the same pattern of kidney injury. Owners most often arrive on this page after discovering their cat has chewed on or been exposed to a lily plant, or after noticing signs such as vomiting, lethargy, or reduced appetite in a cat with access to lilies. In some cases, the exposure is known but the cat appears well; in others, the first signs may prompt the question of what the cat encountered. The timeframe between exposure and the appearance of signs, and the progression of those signs, varies. This page explores the signals that may be observed, the mechanism by which lily compounds affect the kidneys, the investigations that help clarify what is happening, and the range of approaches used in different scenarios. The aim is to orient you to the condition and the shape of the decisions that may follow.