Is dumbcane toxic to cats?
Dumbcane (dieffenbachia) is toxic to cats. The toxic principle is insoluble calcium oxalate crystals which are formed by specialised cells known as idioblasts. These needle-sharp crystals clump together in bundles known as raphides. When a cat chews on the plant, calcium oxalate crystals penetrate the delicate tissue of the mouth and throat leading to intense pain and in some cases, swelling and difficulty breathing.