Dieffenbachia, a common household plant, poses a serious threat to cats. Ingestion can cause severe oral irritation, swelling, and difficulty breathing. Diagnosis is based on physical examination and history. Treatment involves flushing the mouth, administering anti-inflammatories, and pain relievers. Prevention is crucial, including keeping the plant out of reach, training the cat, and using non-toxic alternatives. Recognizing the risks of Dieffenbachia ingestion is essential for cat owners, as prompt action can minimize the potential harm to their beloved pets.