True lilies (Lilium and Hemerocallis species) are extremely toxic to cats but have lower toxicity in dogs. However, Peace Lilies, Calla Lilies, and Lily of the Valley are toxic to dogs and can cause GI distress, heart problems, and seizures.
Why Is This Toxic to Dogs?
Different 'lilies' contain different toxins. True Easter Lilies (Lilium) cause kidney failure in cats but mainly GI upset in dogs. Lily of the Valley (Convallaria) contains cardiac glycosides that can cause heart arrhythmias in dogs.
The confusion around lily toxicity is dangerous — 'lily' is a common name applied to many unrelated plants. Always identify the exact species before assessing risk.
| Lily Species | Toxic Compound | Dangerous Amount | Risk to Dogs |
|---|---|---|---|
| Lily of the Valley | Cardiac glycosides | Any amount | HIGH (dogs) |
| Peace Lily | Calcium oxalate crystals | Any amount | MEDIUM |
| Calla Lily | Calcium oxalate crystals | Any amount | MEDIUM |
| Easter Lily / Tiger Lily | Unknown nephrotoxin | Any amount — EXTREME for cats | LOW–MEDIUM (dogs) |
Symptoms to Watch For
Watch for these signs and call your vet immediately if any appear:
Immediate GI Signs
Drooling, vomiting, mouth pain from calcium oxalate types.
Cardiac Risk (LOTV)
Lily of the Valley — watch for heart rate changes and arrhythmias.
Kidney Risk
Kidney involvement possible with Lilium species in dogs.
Recovery/Monitoring
With treatment, most dogs recover. Cardiac cases need extended monitoring.
🚨 What To Do If Your Dog Was Exposed
Frequently Asked Questions
True lilies (Lilium/Hemerocallis) are dramatically more toxic to cats, causing fatal kidney failure. Dogs are less susceptible but still at risk from Lily of the Valley and other types.
Yes. It contains cardiac glycosides (digoxin-like compounds) that can cause dangerous heart arrhythmias in dogs. Any ingestion requires immediate vet contact.
Peace Lily (Spathiphyllum) causes intense mouth burning and GI irritation from calcium oxalate crystals. It's painful but rarely fatal in dogs.
Identify the species if possible, then call Poison Control. The urgency depends on the lily type but err on the side of caution with any lily ingestion.
Keep all potted plants out of reach, especially Lily of the Valley. In the garden, consider removing or fencing off lily plants.