Yes, Maleberry is toxic to dogs!
Dogs accidentally consuming the Maleberry 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).
Maleberry consumption is also toxic to Cats and Horses.
Toxic Principles Of Maleberry: Grayanotoxins.
More Info About The Maleberry Plant
Scientific Name: Lyonia sp.
Family: Ericaceae.
Also known as: Staggerbush, Fetterbush.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.