Whenever I see poinsettias, my first thought is: "Ack! Poisonous to cats!" And with the holidays upon us, I certainly see a lot around them all around the stores. But, according to some information I read recently, I really don't have to worry about that - the supposed lethal toxicity of poinsettias to cats is just an urban myth. However, other plants really are very dangerous to cats. So, as long as we're thinking about toxic plants, now is as good a time as any to make an i