Yes, Cutleaf Philodendron is toxic to dogs!
Dogs accidentally consuming the Cutleaf Philodendron 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).
Cutleaf Philodendron consumption is also toxic to Cats.
Toxic Principles Of Cutleaf Philodendron: Insoluble calcium oxalates.
More Info About The Cutleaf Philodendron Plant
Scientific Name: Monstera deliciosa
Family: Araceae.
Also known as: Hurricane Plant, Swiss Cheese Plant, Ceriman, Mexican Breadfruit, Split-leaf Philodendron, Window Leaf Plant.
The answer is based on information found on The American Society for the Prevention of Cruelty to Animals (ASPCA) website.