The cineraria is toxic to animals and may harm young children if swallowed. Although the plant has an unpleasant taste, some cats or dogs will chew on household plants out of habit or an urge to graze. A cineraria grown outdoors can be fatal to horses. Hang houseplants well out of reach of pets, and grow outdoor plants inside a fenced area. If you suspect your pet has eaten cineraria leaves, call the veterinarian immediately or go to the nearest animal hospital.