Yes, Warneckei Dracaena is toxic to dogs!
Dogs accidentally consuming the Warneckei Dracaena 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).
Warneckei Dracaena consumption is also toxic to Cats and Horses.
Toxic Principles Of Warneckei Dracaena: Saponins.
More Info About The Warneckei Dracaena Plant
Scientific Name: Dracaena deremensis
Family: Asparagaceae.
Also known as: Striped Dracaena, Janet Craig Plant.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.