Yes, Caladium is toxic to dogs!
Dogs accidentally consuming the Caladium 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).
Caladium consumption is also toxic to Cats and Horses.
Toxic Principles Of Caladium: Insoluble calcium oxalates.
More Info About The Caladium Plant
Scientific Name: Caladium hortulanum
Family: Araceae.
Also known as: Malanga, Elephant’s Ears, Stoplight, Seagull, Mother-in-law Plant, Pink Cloud, Texas Wonder, Angel-Wings, Exposition, Candidum, Fancy-leaved Caladium.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.