Yes, Nasturtium (Watercress) is toxic to dogs!
Dogs accidentally consuming the Nasturtium (Watercress) 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).
Nasturtium (Watercress) consumption is also toxic to Cats and Horses.
Toxic Principles Of Nasturtium (Watercress): Gastrointestinal irritants.
More Info About The Nasturtium (Watercress) Plant
Scientific Name: Nasturtium officinale
Family: Brassicaceae.
Also known as: Watercress, Brunnenkress.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.
