13 Household Plants You May Be Surprised to Learn Are Toxic to Cats

According to the Federal Drug Administration (FDA), mistletoe contains lectins and phoratoxins, which are poisonous to cats. "These chemicals affect the heart, causing low blood pressure and slowed heart rate," the FDA's website reads. "Fortunately for Fido, Tigger, and Trigger, severe mistletoe toxicity is uncommon and usually only occurs if your pet eats a large amount." Cats who eat big quantities of this holiday green may suffer from stomach pain, difficulty breathing, vomiting, diarrhea, and low blood pressure.