Yes, Lily of the Valley is toxic to dogs!
Dogs accidentally consuming the Lily of the Valley plants can show the following clinical symptoms: Vomiting, Prolonged Depression, Incoordination, Hypersalivaton, Sleepiness Or Excitation, Dilated Pupils, Low Body Temperature, Low Blood Pressure, Coma, Seizure And Death (In Rare Cases).
Lily of the Valley consumption is also toxic to Cats and Horses.
Toxic Principles Of Lily of the Valley: Cardenolides (convallarin, and others).
More Info About The Lily of the Valley Plant
Scientific Name: Convallaria majalis
Family: Asparagaceae.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.
