Yes, Wild Calla is toxic to dogs!
Dogs accidentally consuming the Wild Calla 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).
Wild Calla consumption is also toxic to Cats and Horses.
Toxic Principles Of Wild Calla: Insoluble calcium oxalates.
More Info About The Wild Calla Plant
Scientific Name: Arum palestinum
Family: Araceae.
Also known as: Black Calla, Wild Arum, Solomon’s Lily.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.