Smoking isn’t good for your health and second-hand smoke isn’t good for other people, so it only makes sense that second-hand smoke isn’t good for your cat’s health either. Not surprisingly, cats can suffer lung damage and cancer from exposure to cigarette smoke.
Even worse, smoke residue can settle on the cat’s fur. Unless you bathe your cat regularly, those chemicals remain on the fur where the cat can lick and ingest them, making them sick. Generally if you’re going to smoke, treat secondhand smoke around your cat like you would around a child. In other words, don’t do it around your cat.