Exposure to cigarette smoke found to increase cancer risk in dogs One of our customers has had first hand experience of this recently. One cigarette butt can contain enough nicotine to poison a dog. Especially puppies and smaller breeds. What can happen Magnets: Pets and Tobacco Products (7"W x 5"H) Central District Health Secondhand smoke and e cigarette aerosol exposure in dogs and cats: A scoping review with implications for smoking cessation among pet owners Can Drug Dogs Smell Nicotine? Everything You Need to Know