Yes, Coffee Tree is toxic to dogs!
Dogs accidentally consuming the Coffee Tree 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).
Coffee Tree consumption is also toxic to Cats and Horses.
Toxic Principles Of Coffee Tree: Saponin.
More Info About The Coffee Tree Plant
Scientific Name: Polyscias guilfoylei
Family: Araliaceae.
Also known as: Wild Coffee, Geranium-Leaf Aralia.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.