Poinsettia is often mentioned as a potentially poisonous plant but its reputation is perhaps unfair. Over half the cases of pets eating Poinsettia plants reported, the cat or dog shows no signs of illness. If they do show any signs they are mild such as being sick, drooling, refusing food and being quieter than normal. Even these signs soon resolve without any specific treatment. Nevertheless, it is still a good idea to keep the plant out of reach. In addition, mistletoe, holly, ivy and Christmas cherry can cause a tummy upset and should be kept away from inquisitive cats.