Yes, Mock Azalea is toxic to dogs!
Dogs accidentally consuming the Mock Azalea 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).
Mock Azalea consumption is also toxic to Cats.
Toxic Principles Of Mock Azalea: Digitalis like glycosides.
More Info About The Mock Azalea Plant
Scientific Name: Adenium obesum
Family: Apocynaceae.
Also known as: Desert Rose, Desert Azalea, Sabi Star, Impala Lily, Kudu Lily.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.