Yes, Wax-Leaf is toxic to dogs!
Dogs accidentally consuming the Wax-Leaf 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).
Wax-Leaf consumption is also toxic to Cats and Horses.
Toxic Principles Of Wax-Leaf: Terpenoid glycosides.
More Info About The Wax-Leaf Plant
Scientific Name: Ligustrum japonicum
Family: Oleaceae.
Also known as: privet, amur, common privet.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.