Are Begonias Poisonous To Cats. It is mildly toxic to horses, pigs, goats, chickens, and other animals. If cats eat the begonia plant, they will experience severe mouth burning and irritation.

If you eat it carelessly, it will lead to nausea and vomiting, diarrhea, sore throat, dyspnea and other poisoning symptoms. Begonias can be fatal to cats when eaten in large amounts. Your pet may also experience excessive drooling, vomiting, and difficulty swallowing if it has been ingestion.