Yes, Variable Dieffenbachia is toxic to dogs!
Dogs accidentally consuming the Variable Dieffenbachia 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).
Variable Dieffenbachia consumption is also toxic to Cats.
Toxic Principles Of Variable Dieffenbachia: Calcium oxalate crystals.
More Info About The Variable Dieffenbachia Plant
Scientific Name: Dieffenbachia picta
Family: Araceae.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.